GTK: Use GtkWindows instead of GtkFixed when rendering icons.
GTK: Use GtkWindows instead of GtkFixed when rendering icons.

There is some weird interaction with the gtk-qt-engine. If we don't use a
GtkWindow to render the icons, we will render the GNOME default folder icon
instead of the folder icon of the current KDE theme.

BUG=37494
TEST=none

Review URL: http://codereview.chromium.org/1687006

git-svn-id: http://src.chromium.org/svn/trunk/src@45245 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 7f8df0db4b8ef066b6059bc7ad86c2b80e89ea7d
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser