GitLab

Remove ResourceUpdate::CreateFromCanvas().
|canvas| member variable of ResourceUpdate is not used by ResourceUpdateController.
Also all customer of ResourceUpdate can pass SkBitmap.

R=enne@chromium.org, danakj@chromium.org
BUG=NONE
TEST=cc_unittests --gtest_filter=ResourceUpdateControllerTest.*

Review URL: https://codereview.chromium.org/127053004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243856 0039d316-1c4b-4281-b951-d872f2087c98