change clang-format settings in docs/vscode.md and docs/qtcreator.md

BUG=

Review-Url: https://codereview.chromium.org/2729853008
Cr-Commit-Position: refs/heads/master@{#454640}

docs/qtcreator.md

@@ -12,7 +12,8 @@ not require project configuration.
 
 ### Workflow
 
-1. `ctrl+k` Activate Locator, you can open file(not support sublime-like-search) or type `. ` go to symbol.
+1. `ctrl+k` Activate Locator, you can open file(not support sublime-like-search)
+   or type `. ` go to symbol.
 2. `ctrl+r` Build and Run, `F5` Debug.
 3. `F4` switch between header file and cpp file.
 4. `ctrl+shift+r` rename symbol under cursor.
@@ -30,8 +31,9 @@ block you while parsing.
 #### Code Style
 
 1. Help - About Plugins enable Beautifier.
-2. Tools - Options - Beautifier - Clang Format, select use predefined style: 
-chromium. You can also set a keyboard shortcut for it.
+2. Tools - Options - Beautifier - Clang Format, 
+   change Clang format command: `$depot_tools_dir/clang-format`, select use 
+   predefined style: file. You can also set a keyboard shortcut for it.
 3. Tools - Options - Code Style import this xml file
 
 ```

docs/vscode.md

@@ -44,8 +44,8 @@ settings.
   "ycmd.confirm_extra_conf": false,
   "ycmd.use_imprecise_get_type": true,
   // clang-format
-  "clang-format.style": "Chromium",
-  "editor.formatOnSave": true
+  "clang-format.executable": "<your_depot_tools>/clang-format",
+  "clang-format.style": "file"
 }
 ```