Implement new page action API.

chrome/browser/gtk/location_bar_view_gtk.h

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_GTK_LOCATION_BAR_VIEW_GTK_H_
 #define CHROME_BROWSER_GTK_LOCATION_BAR_VIEW_GTK_H_
 
 #include <gtk/gtk.h>
 
 #include <string>
@@ skipping 116 matching lines @@
     // The current profile (not owned by us).
     Profile* profile_;
 
     // The PageAction that this view represents. The PageAction is not owned by
     // us, it resides in the extension of this particular profile.
     const ExtensionAction* page_action_;
 
     // The icons representing different states for the page action.
     std::vector<GdkPixbuf*> pixbufs_;
 
+    // A cache of the last dynamically generated bitmap and the pixbuf that
+    // corresponds to it. We keep track of both so we can free old pixbufs as
+    // their icons are replaced.
+    SkBitmap* last_icon_skbitmap_;
+    GdkPixbuf* last_icon_pixbuf_;
+
     // The object that is waiting for the image loading to complete
     // asynchronously.  It will delete itself once it is done.
     ImageLoadingTracker* tracker_;
 
     // The widgets for this page action.
     OwnedWidgetGtk event_box_;
     OwnedWidgetGtk image_;
 
     // The tab id we are currently showing the icon for.
     int current_tab_id_;
@@ skipping 86 matching lines @@
 
   // Provides colors and rendering mode.
   GtkThemeProvider* theme_provider_;
 
   NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(LocationBarViewGtk);
 };
 
 #endif  // CHROME_BROWSER_GTK_LOCATION_BAR_VIEW_GTK_H_