Use the extension icon for extension omnibox results instead of the generic

chrome/browser/autocomplete/autocomplete_popup_view_gtk.h

Index: chrome/browser/autocomplete/autocomplete_popup_view_gtk.h
diff --git a/chrome/browser/autocomplete/autocomplete_popup_view_gtk.h b/chrome/browser/autocomplete/autocomplete_popup_view_gtk.h
index 4759417b5e8425ac6f70f6606c60e5290e296d8e..29424894217b62067931b6a257c94884a7ab3f11 100644
--- a/chrome/browser/autocomplete/autocomplete_popup_view_gtk.h
+++ b/chrome/browser/autocomplete/autocomplete_popup_view_gtk.h
@@ -6,6 +6,7 @@
 #define CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_POPUP_VIEW_GTK_H_
 
 #include <gtk/gtk.h>
+#include <map>
 
 #include "base/basictypes.h"
 #include "base/scoped_ptr.h"
@@ -16,6 +17,7 @@
 
 class AutocompleteEditModel;
 class AutocompleteEditView;
+class AutocompleteMatch;
 class AutocompletePopupModel;
 class GtkThemeProvider;
 class Profile;
@@ -56,6 +58,8 @@ class AutocompletePopupViewGtk : public AutocompletePopupView,
   // Accept a line of the results, for example, when the user clicks a line.
   void AcceptLine(size_t line, WindowOpenDisposition disposition);
 
+  GdkPixbuf* IconForMatch(const AutocompleteMatch& match, bool selected);
+
   static gboolean HandleExposeThunk(GtkWidget* widget, GdkEventExpose* event,
                                     gpointer userdata) {
     return reinterpret_cast<AutocompletePopupViewGtk*>(userdata)->
@@ -99,6 +103,11 @@ class AutocompletePopupViewGtk : public AutocompletePopupView,
   GtkThemeProvider* theme_provider_;
   NotificationRegistrar registrar_;
 
+  // Used to cache GdkPixbufs and map them from the SkBitmaps they were created
+  // from.
+  typedef std::map<const SkBitmap*, GdkPixbuf*> PixbufMap;
+  PixbufMap pixbufs_;
+
   // A list of colors which we should use for drawing the popup. These change
   // between gtk and normal mode.
   GdkColor border_color_;