Set the details field of the BROWSER_THEME_CHANGED notification to

chrome/browser/gtk/gtk_theme_provider.h

 // Copyright (c) 2010 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_GTK_THEME_PROVIDER_H_
 #define CHROME_BROWSER_GTK_GTK_THEME_PROVIDER_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 101 matching lines @@
   typedef std::map<int, color_utils::HSL> TintMap;
   typedef std::map<int, SkBitmap*> ImageCache;
 
   // Clears all the GTK color overrides.
   virtual void ClearAllThemeData();
 
   // Load theme data from preferences, possibly picking colors from GTK.
   virtual void LoadThemePrefs();
 
   // Let all the browser views know that themes have changed.
-  virtual void NotifyThemeChanged();
+  virtual void NotifyThemeChanged(Extension* extension);
 
   // Additionally frees the CairoCachedSurfaces.
   virtual void FreePlatformCaches();
 
   // Handles signal from GTK that our theme has been changed.
   static void OnStyleSet(GtkWidget* widget,
                          GtkStyle* previous_style,
                          GtkThemeProvider* provider);
 
   // Extracts colors and tints from the GTK theme, both for the
@@ skipping 75 matching lines @@
 
   // The default folder icon and default bookmark icon for the GTK theme.
   // These are static because the system can only have one theme at a time.
   // They are cached when they are requested the first time, and cleared when
   // the system theme changes.
   static GdkPixbuf* default_folder_icon_;
   static GdkPixbuf* default_bookmark_icon_;
 };
 
 #endif  // CHROME_BROWSER_GTK_GTK_THEME_PROVIDER_H_