Implement new page action API.

chrome/browser/gtk/location_bar_view_gtk.h

Index: chrome/browser/gtk/location_bar_view_gtk.h
diff --git a/chrome/browser/gtk/location_bar_view_gtk.h b/chrome/browser/gtk/location_bar_view_gtk.h
index 3fe531a08af523ac26e6ddc66350c8cd6d1f70d8..32a5f9e4c8debf835f6165e2fca6244b5dfaf11c 100644
--- a/chrome/browser/gtk/location_bar_view_gtk.h
+++ b/chrome/browser/gtk/location_bar_view_gtk.h
@@ -134,6 +134,12 @@ class LocationBarViewGtk : public AutocompleteEditController,
     // 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_;