GTK: Clean up the gtk extension infobar implementation.

chrome/browser/ui/gtk/custom_button.h

Index: chrome/browser/ui/gtk/custom_button.h
diff --git a/chrome/browser/ui/gtk/custom_button.h b/chrome/browser/ui/gtk/custom_button.h
index 22b19369d6bb11a974d44dd7c88e53310fd63a48..d4c77377dd2b509ca4140b14208eb13b6195f146 100644
--- a/chrome/browser/ui/gtk/custom_button.h
+++ b/chrome/browser/ui/gtk/custom_button.h
@@ -158,6 +158,10 @@ class CustomDrawButton : public NotificationObserver {
 
   void Init();
 
+  // Make this CustomDrawButton always use the chrome style rendering; it will
+  // never render gtk-like.
+  void ForceChromeTheme();
+
   // Flip the image horizontally. Not to be used for RTL/LTR reasons. (In RTL
   // mode, this will unflip the image.)
   void set_flipped(bool flipped) { button_base_.set_flipped(flipped); }
@@ -222,6 +226,10 @@ class CustomDrawButton : public NotificationObserver {
   // Our theme provider.
   GtkThemeService* theme_service_;
 
+  // Some buttons are always drawn in chrome style because they are part of
+  // HTML extensions.

[Evan Stade, 2011/08/31 20:00:12]

explaining the current use of this var is a little extraneous / prone to getting
stale

+  bool forcing_chrome_theme_;
+
   // Used to listen for theme change notifications.
   NotificationRegistrar registrar_;