Also
- removed the temp work-around in disabled_extensions_view.cc.
- pngcrushed the images in common/.

BUG=165808
TEST=Verify hotdog menu bubble does not go beyond browser window.

R=oshima@chromium.org,finnur@chromium.org
TBR=msw@chromium.org,sky@chromium.org

Review URL: https://codereview.chromium.org/11778074

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@176104 0039d316-1c4b-4281-b951-d872f2087c98