Fix for out-of-sync scale factor issue
- Set active root window early when creating browsers on startup.
- Send screen info when device scale factor chagned.
- gfx::Screen::GetDisplayNearestWindow should return Primary when the window's root doesn't exist. I missed this condition in  https://chromiumcodereview.appspot.com/10961021

BUG=155201, 152728
TEST=manual: see bug for repro steps

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=161758

Review URL: https://chromiumcodereview.appspot.com/11066130

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@162691 0039d316-1c4b-4281-b951-d872f2087c98
3 files changed