Fixing issue with clicking of context menu items from overflow shelf menu.
(This seems to be a side effect / regression because of https://chromiumcodereview.appspot.com/23540013)

BUG=295569
R=jamescook,oshima
TEST=Please follow steps as described in the bug.

Review URL: https://codereview.chromium.org/26091003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227448 0039d316-1c4b-4281-b951-d872f2087c98
Remove TexImage2DImmediate as a first example of removing an immediate function. They are not currently used and no plans to do so.

Review URL: https://codereview.chromium.org/26211005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227449 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 227449