Update URLs in docs; replace some uses of 'master'

Bug: 1231155
Change-Id: I0634229c0739c97ac0d7530dd58c33771958149a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3042058
Reviewed-by: Toby Huang <tobyhuang@chromium.org>
Commit-Queue: Andrew Williams <awillia@google.com>
Cr-Commit-Position: refs/heads/master@{#903745}

docs/android_build_instructions.md

@@ -116,7 +116,7 @@ development and testing purposes.
 ## Setting up the build
 
 Chromium uses [Ninja](https://ninja-build.org) as its main build tool along with
-a tool called [GN](https://gn.googlesource.com/gn/+/master/docs/quick_start.md)
+a tool called [GN](https://gn.googlesource.com/gn/+/main/docs/quick_start.md)
 to generate `.ninja` files. You can create any number of *build directories*
 with different configurations. To create a build directory which builds Chrome
 for Android, run `gn args out/Default` and edit the file to contain the
@@ -135,7 +135,7 @@ target_cpu = "arm64"  # See "Figuring out target_cpu" below
   configuration](https://www.chromium.org/developers/gn-build-configuration).
   The default will be a debug component build.
 * For more info on GN, run `gn help` on the command line or read the
-  [quick start guide](https://gn.googlesource.com/gn/+/master/docs/quick_start.md).
+  [quick start guide](https://gn.googlesource.com/gn/+/main/docs/quick_start.md).
 
 Also be aware that some scripts (e.g. `tombstones.py`, `adb_gdb.py`)
 require you to set `CHROMIUM_OUTPUT_DIR=out/Default`.
@@ -143,7 +143,7 @@ require you to set `CHROMIUM_OUTPUT_DIR=out/Default`.
 ### Figuring out target\_cpu
 
 The value of
-[`target_cpu`](https://gn.googlesource.com/gn/+/master/docs/reference.md#target_cpu)
+[`target_cpu`](https://gn.googlesource.com/gn/+/main/docs/reference.md#var_target_cpu)
 determines what instruction set to use for native code. Given a device (or
 emulator), you can determine the correct instruction set with `adb shell getprop
 ro.product.cpu.abi`:
@@ -223,7 +223,7 @@ $ gclient sync
 
 The first command updates the primary Chromium source repository and rebases
 any of your local branches on top of tip-of-tree (aka the Git branch
-`origin/master`). If you don't want to use this script, you can also just use
+`origin/main`). If you don't want to use this script, you can also just use
 `git pull` or other common Git commands to update the repo.
 
 The second command syncs dependencies to the appropriate versions and re-runs

docs/android_cast_build_instructions.md

@@ -116,7 +116,7 @@ development and testing purposes.
 ## Setting up the build
 
 Chromium uses [Ninja](https://ninja-build.org) as its main build tool along with
-a tool called [GN](https://gn.googlesource.com/gn/+/master/docs/quick_start.md)
+a tool called [GN](https://gn.googlesource.com/gn/+/main/docs/quick_start.md)
 to generate `.ninja` files. You can create any number of *build directories*
 with different configurations. To create a build directory which builds Chrome
 for Android, run:
@@ -134,7 +134,7 @@ $ gn gen --args='target_os="android" is_chromecast=true' out/Default
   The default will be a debug component build matching the current host
   operating system and CPU.
 * For more info on GN, run `gn help` on the command line or read the
-  [quick start guide](https://gn.googlesource.com/gn/+/master/docs/quick_start.md).
+  [quick start guide](https://gn.googlesource.com/gn/+/main/docs/quick_start.md).
 
 Also be aware that some scripts (e.g. `tombstones.py`, `adb_gdb.py`)
 require you to set `CHROMIUM_OUTPUT_DIR=out/Default`.

docs/building_old_revisions.md

@@ -21,7 +21,7 @@ before continuing by setting the environment variable `DEPOT_TOOLS_UPDATE=0`.
 ~/chrome/src $ COMMIT_DATE=$(git log -n 1 --pretty=format:%ci)
 
 # Check out depot_tools revision from the same time:
-~/depot_tools $ git checkout $(git rev-list -n 1 --before="$COMMIT_DATE" master)
+~/depot_tools $ git checkout $(git rev-list -n 1 --before="$COMMIT_DATE" main)
 ~/depot_tools $ export DEPOT_TOOLS_UPDATE=0
 ```
 
@@ -83,7 +83,7 @@ You may also need to disable goma (if enabled).
 When returning to a normal checkout, you may need to undo some of the changes
 above:
 
-*   Restore `depot_tools` to the `master` branch.
+*   Restore `depot_tools` to the `main` branch.
 *   Clean up any `_bad_scm/` directories in the directory containing `.gclient`.
 *   Revert your `.gclient` file if `gclient` changed it:
 

docs/clangd.md

@@ -2,7 +2,7 @@
 
 ## Introduction
 
-[clangd](https://clang.llvm.org/extra/clangd/) is a clang-based [language server](http://langserver.org/).
+[clangd](https://clangd.llvm.org/) is a clang-based [language server](https://langserver.org/).
 It brings IDE features (e.g. diagnostics, code completion, code navigations) to
 your editor.
 
@@ -21,7 +21,7 @@ tools/clang/scripts/generate_compdb.py -p out/<build> > compile_commands.json
 
 ## Getting clangd
 
-See [instructions](https://clang.llvm.org/extra/clangd/Installation.html#installing-clangd).
+See [instructions](https://clangd.llvm.org/installation.html#installing-clangd).
 
 **Googlers:** clangd has been installed on your glinux by default, just use
 `/usr/bin/clangd`.
@@ -76,7 +76,7 @@ ninja -C out/Release chrome
 ```
 
 4. Use clangd in your favourite editor, see detailed [instructions](
-https://clang.llvm.org/extra/clangd/Installation.html#getting-started-with-clangd).
+https://clangd.llvm.org/installation.html#editor-plugins).
 
 ## Background Indexing
 

docs/commit_checklist.md

@@ -20,7 +20,7 @@ power figuring out the next step to take.
 You should create a new branch before starting any development work. It's
 helpful to branch early and to branch often in Git. Use the command
 `git new-branch <branch_name>`. This is equivalent to
-`git checkout -b <branch_name> --track origin/master`.
+`git checkout -b <branch_name> --track origin/main`.
 
 You may also want to set another local branch as the upstream branch. You can do
 that with `git checkout -b <branch_name> --track <upstream_branch>`. Do this if
@@ -126,7 +126,7 @@ shortcut for combining the previous step and this one is `git commit -a -m
 If you have many commits on your current branch, and you want to avoid some
 nasty commit-by-commit merge conflicts in the next step, consider collecting all
 your changes into one commit. Run `git rebase -i @{u}`. The `@{u}` is a
-short-hand pointer for the upstream branch, which is usually origin/master, but
+short-hand pointer for the upstream branch, which is usually origin/main, but
 can also be one of your local branches. After running the `git rebase` command,
 you should see a list of commits, with each commit starting with the word
 "pick". Make sure the first commit says "pick" and change the rest from "pick"

docs/fuchsia/build_instructions.md

@@ -126,7 +126,7 @@ $ gclient sync
 
 The first command updates the primary Chromium source repository and rebases
 any of your local branches on top of tip-of-tree (aka the Git branch
-`origin/master`). If you don't want to use this script, you can also just use
+`origin/main`). If you don't want to use this script, you can also just use
 `git pull` or other common Git commands to update the repo.
 
 The second command syncs dependencies to the appropriate versions and re-runs
@@ -147,7 +147,7 @@ $ unzip /path/to/clang.zip bin/llvm-ar -d ${CHROMIUM_SRC}/third_party/llvm-build
 ## Setting up the build
 
 Chromium uses [Ninja](https://ninja-build.org) as its main build tool along with
-a tool called [GN](https://gn.googlesource.com/gn/+/master/docs/quick_start.md)
+a tool called [GN](https://gn.googlesource.com/gn/+/main/docs/quick_start.md)
 to generate `.ninja` files. You can create any number of *build directories*
 with different configurations. To create a build directory, run:
 

docs/git_tips.md

@@ -60,7 +60,7 @@ an old version of a CL.
 ```bash
 #!/bin/bash
 # Commit all, amending if not initial commit.
-if git status | grep -q "# Your branch is ahead of 'master' by 1 commit."
+if git status | grep -q "Your branch is ahead of 'origin/main' by 1 commit."
 then
   git commit --all --amend
 else

docs/gpu/gpu_testing.md

@@ -355,10 +355,10 @@ Example usage:
 If, for some reason, the local run code is unable to determine what the git
 revision is, simply pass `--git-revision aabbccdd`. Note that `aabbccdd` must
 be replaced with an actual Chromium src revision (typically whatever revision
-origin/master is currently synced to) in order for the tests to work. This can
+origin/main is currently synced to) in order for the tests to work. This can
 be done automatically using:
 ``run_gpu_integration_test.py pixel --no-skia-gold-failure --local-pixel-tests
---passthrough --git-revision `git rev-parse origin/master` ``
+--passthrough --git-revision `git rev-parse origin/main` ``
 
 ## Running Binaries from the Bots Locally
 

docs/ios/build_instructions.md

@@ -318,7 +318,7 @@ $ gclient sync
 
 The first command updates the primary Chromium source repository and rebases
 any of your local branches on top of tip-of-tree (aka the Git branch
-`origin/master`). If you don't want to use this script, you can also just use
+`origin/main`). If you don't want to use this script, you can also just use
 `git pull` or other common Git commands to update the repo.
 
 The second command syncs dependencies to the appropriate versions and re-runs

docs/linux/build_instructions.md

@@ -111,7 +111,7 @@ development and testing purposes.
 ## Setting up the build
 
 Chromium uses [Ninja](https://ninja-build.org) as its main build tool along with
-a tool called [GN](https://gn.googlesource.com/gn/+/master/docs/quick_start.md)
+a tool called [GN](https://gn.googlesource.com/gn/+/main/docs/quick_start.md)
 to generate `.ninja` files. You can create any number of *build directories*
 with different configurations. To create a build directory, run:
 
@@ -128,7 +128,7 @@ $ gn gen out/Default
   The default will be a debug component build matching the current host
   operating system and CPU.
 * For more info on GN, run `gn help` on the command line or read the
-  [quick start guide](https://gn.googlesource.com/gn/+/master/docs/quick_start.md).
+  [quick start guide](https://gn.googlesource.com/gn/+/main/docs/quick_start.md).
 
 ### <a name="faster-builds"></a>Faster builds
 
@@ -288,7 +288,7 @@ $ gclient sync
 
 The first command updates the primary Chromium source repository and rebases
 any of your local branches on top of tip-of-tree (aka the Git branch
-`origin/master`). If you don't want to use this script, you can also just use
+`origin/main`). If you don't want to use this script, you can also just use
 `git pull` or other common Git commands to update the repo.
 
 The second command syncs dependencies to the appropriate versions and re-runs

docs/linux/cast_build_instructions.md

@@ -99,7 +99,7 @@ development and testing purposes.
 ## Setting up the build
 
 Chromium uses [Ninja](https://ninja-build.org) as its main build tool along with
-a tool called [GN](https://gn.googlesource.com/gn/+/master/docs/quick_start.md)
+a tool called [GN](https://gn.googlesource.com/gn/+/main/docs/quick_start.md)
 to generate `.ninja` files. You can create any number of *build directories*
 with different configurations. To create a build directory, run:
 
@@ -116,7 +116,7 @@ $ gn gen out/Default --args='is_chromecast=true'
   The default will be a debug component build matching the current host
   operating system and CPU.
 * For more info on GN, run `gn help` on the command line or read the
-  [quick start guide](https://gn.googlesource.com/gn/+/master/docs/quick_start.md).
+  [quick start guide](https://gn.googlesource.com/gn/+/main/docs/quick_start.md).
 
 ### <a name="faster-builds"></a>Faster builds
 
@@ -153,7 +153,7 @@ $ gclient sync
 
 The first command updates the primary Chromium source repository and rebases
 any of your local branches on top of tip-of-tree (aka the Git branch
-`origin/master`). If you don't want to use this script, you can also just use
+`origin/main`). If you don't want to use this script, you can also just use
 `git pull` or other common Git commands to update the repo.
 
 The second command syncs dependencies to the appropriate versions and re-runs

docs/mac_build_instructions.md

@@ -95,7 +95,7 @@ development and testing purposes.
 ## Setting up the build
 
 Chromium uses [Ninja](https://ninja-build.org) as its main build tool along with
-a tool called [GN](https://gn.googlesource.com/gn/+/master/docs/quick_start.md)
+a tool called [GN](https://gn.googlesource.com/gn/+/main/docs/quick_start.md)
 to generate `.ninja` files. You can create any number of *build directories*
 with different configurations. To create a build directory:
 
@@ -112,7 +112,7 @@ $ gn gen out/Default
   The default will be a debug component build matching the current host
   operating system and CPU.
 * For more info on GN, run `gn help` on the command line or read the
-  [quick start guide](https://gn.googlesource.com/gn/+/master/docs/quick_start.md).
+  [quick start guide](https://gn.googlesource.com/gn/+/main/docs/quick_start.md).
 * Building Chromium for arm Macs requires [additional setup](mac_arm64.md).
 
 
@@ -213,7 +213,7 @@ $ gclient sync
 
 The first command updates the primary Chromium source repository and rebases
 any of your local branches on top of tip-of-tree (aka the Git branch
-`origin/master`). If you don't want to use this script, you can also just use
+`origin/main`). If you don't want to use this script, you can also just use
 `git pull` or other common Git commands to update the repo.
 
 The second command syncs dependencies to the appropriate versions and re-runs

docs/security/ev-to-page-info.md

@@ -48,7 +48,7 @@ been implemented as such ever since.
 This change is being incorporated into the Chrome-specific UI code and will not
 affect embedders that are based solely on the underlying content layer.
 Embedders that incorporate the Chrome-specific code will either take up these
-changes or maintain a diff from the master Chromium branch.
+changes or maintain a diff from the `main` Chromium branch.
 
 
 ## Further Reading

docs/testing/using_crashpad_with_content_shell.md

@@ -11,7 +11,7 @@ On all platforms, build the target `blink_tests`.
 
 *** note
 **Mac:** Add `enable_dsyms = 1` to your [gn build
-arguments](https://gn.googlesource.com/gn/+/master/docs/quick_start.md) before
+arguments](https://gn.googlesource.com/gn/+/main/docs/quick_start.md) before
 building. This slows down linking several minutes, so don't just always set it
 by default.
 ***

docs/windows_build_instructions.md

@@ -167,7 +167,7 @@ development and testing purposes.
 ## Setting up the build
 
 Chromium uses [Ninja](https://ninja-build.org) as its main build tool along with
-a tool called [GN](https://gn.googlesource.com/gn/+/master/docs/quick_start.md)
+a tool called [GN](https://gn.googlesource.com/gn/+/main/docs/quick_start.md)
 to generate `.ninja` files. You can create any number of *build directories*
 with different configurations. To create a build directory:
 
@@ -185,7 +185,7 @@ $ gn gen out/Default
   The default will be a debug component build matching the current host
   operating system and CPU.
 * For more info on GN, run `gn help` on the command line or read the [quick
-  start guide](https://gn.googlesource.com/gn/+/master/docs/quick_start.md).
+  start guide](https://gn.googlesource.com/gn/+/main/docs/quick_start.md).
 
 ### Faster builds
 
@@ -387,9 +387,9 @@ $ gclient sync -D
 ```
 
 The first command updates the primary Chromium source repository and rebases
-any of your local branches on top of tip-of-tree (aka the Git branch `origin/master`).
-If you don't want to use this script, you can also just use `git pull` or
-other common Git commands to update the repo.
+any of your local branches on top of tip-of-tree (aka the Git branch
+`origin/main`). If you don't want to use this script, you can also just use
+`git pull` or other common Git commands to update the repo.
 
 The second command syncs the subrepositories to the appropriate versions,
 deleting those that are no longer needed, and re-runs the hooks as needed.