GTK Theme: Don't render IDR_THEME_TOOLBAR on GtkWidgets.

GTK Theme: Don't render IDR_THEME_TOOLBAR on GtkWidgets.

IDR_THEME_TOOLBAR is a generated blank image of the bg[SELECTED] color,
which will be drawn by default on GtkWidgets. Uploading an image of
said color to the X server on each expose and then asking it to tile the
image across the widget is silly; stop doing it.

Also sets clip rectangles correctly in a few places where we were using GdkGC
instead of skia.

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=25647

[Evan Martin, 2009-09-08 18:32:03]

LGTM