GTK: Move to gtk_widget_get_allocation() for some of chrome/browser/ui/gtk/

BUG=79722
TEST=compiles


Review URL: http://codereview.chromium.org/8743021

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@112518 0039d316-1c4b-4281-b951-d872f2087c98
5 files changed