GitLab

added ImageSkiaOperations and replaced Bitmap with ImageSkiaRep/ImagSkia.

BUG=122992
TEST=manual

Review URL: https://chromiumcodereview.appspot.com/10704113

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@145976 0039d316-1c4b-4281-b951-d872f2087c98