GitLab

This CL contains the following fixes:
- shows the notification for display rotation / ui_scale
- adds (width x height) annotation to the display if something
  has been edited
- shows the internal display's status if something for the internal
  display has been edited and no external display is connected
- shows the tooltip text to provide the status of both internal and
  extrenal displays at the same time

This CL does not contain:
- the feature to prevent notification when the settings change happens
  from chrome://settings/display

I think we can achieve this by suppressing the notification when
the current active tab is chrome://settings/display, but anyways
it'll be done in another CL. That is marked as a TODO.

BUG=250650, 246271

Review URL: https://chromiumcodereview.appspot.com/17445002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@207998 0039d316-1c4b-4281-b951-d872f2087c98