Rename WebsiteSettings code to PageInfo.

This was automated using a script [1] that does the following:
- Rename relevant files in the following folders from website_settings* to
  page_info*:
  - chrome/browser/ui/page_info
  - chrome/browser/ui/cocoa/page_info
  - chrome/browser/ui/views/page_info
  - chrome/browser/ui/android/page_info
  - chrome/android/java/res/layout
- Run `./tools/git/mass-rename.py` to update e.g. includes, build files, header
  guards.
  - mass-rename.py does not handle test files (https://crbug.com/701529) or
    Java, so those are handled separately, either in an early step are as part
    of the later renames.
  - `page_info_bubble_controller.h` needs a separate header guard fix.
- Use `sed` to rename classes, enums, non-UMA strings, and comments *WebsiteSettings* to *PageInfo* across the entire Chromium project.
  - Since several content settings classes are also called "WebsiteSettings", this is done by taking a full list of all occurrences of full tokens containing "WebsiteSettings", "website_settings", or "website settings" and whitelisting individual replacements.
  - To avoid modifying strings, all lines containing the relevant tokens *following at least one quote mark on the same line* are preserved, except two individually handled cases. There do not appear to be any affected multi-line strings.
- `git cl format`
- Remove two long-standing TODO comments about this rename, in:
  - PageInfoPopup.java
  - page_info_bubble_controller.h

This CL does not attempt to reflow comments; all changes stay within 80 lines, though.

[1] https://github.com/lgarron/website-settings-to-page-info/blob/master/page_info.fish

BUG=571506
TBR=jochen@chromium.org

Review-Url: https://codereview.chromium.org/2754383004
Cr-Commit-Position: refs/heads/master@{#459562}

docs/ui/views/macviews_release.md

@@ -35,7 +35,7 @@ dialogs are:
 5. One-click signin
 6. Site permissions bubble
 7. "Card unmask prompt" (TODO(ellyjones): what is this?)
-8. Website settings dialog
+8. Page info dialog
 
 Once all of these dialogs are converted and tested behind the feature, we can
 ship to canary and dev channels and watch for any performance or crash rate