GTK Themes: Tint throbbers like we tint all other buttons in the interface.

chrome/browser/gtk/tabs/tab_strip_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_TABS_TAB_STRIP_GTK_H_
 #define CHROME_BROWSER_GTK_TABS_TAB_STRIP_GTK_H_
 
 #include <gtk/gtk.h>
 #include <vector>
 
@@ skipping 103 matching lines @@
       TabStripModel::ContextMenuCommand command_id, TabGtk* tab);
   virtual void StartHighlightTabsForCommand(
       TabStripModel::ContextMenuCommand command_id, TabGtk* tab);
   virtual void StopHighlightTabsForCommand(
       TabStripModel::ContextMenuCommand command_id, TabGtk* tab);
   virtual void StopAllHighlighting();
   virtual void MaybeStartDrag(TabGtk* tab, const gfx::Point& point);
   virtual void ContinueDrag(GdkDragContext* context);
   virtual bool EndDrag(bool canceled);
   virtual bool HasAvailableDragActions() const;
+  virtual ThemeProvider* GetThemeProvider();
 
   // MessageLoop::Observer implementation:
   virtual void WillProcessEvent(GdkEvent* event);
   virtual void DidProcessEvent(GdkEvent* event);
 
   // Overridden from NotificationObserver:
   virtual void Observe(NotificationType type,
                        const NotificationSource& source,
                        const NotificationDetails& details);
 
@@ skipping 294 matching lines @@
   // ResizeLayoutTabsNow method.
   ScopedRunnableMethodFactory<TabStripGtk> resize_layout_factory_;
 
   // True if the tabstrip has already been added as a MessageLoop observer.
   bool added_as_message_loop_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(TabStripGtk);
 };
 
 #endif  // CHROME_BROWSER_GTK_TABS_TAB_STRIP_GTK_H_