Add high DPI assets and update defaults for CrOS find in page bar.

The new theme has a pushed image for the find next and find prev buttons, requires the find in page text boxes to have a transparent background as the theme draws a partially transparent text box area which partially shows the theme panel color through. Also we use the tab close button for the find in page bar.

BUG=149032
TEST=Run chrome with --force-device-scale-factor=2, find in page bar is high DPI.

Review URL: https://chromiumcodereview.appspot.com/10908234

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@157358 0039d316-1c4b-4281-b951-d872f2087c98
62 files changed