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

chrome/browser/gtk/tabs/tab_gtk.h

Index: chrome/browser/gtk/tabs/tab_gtk.h
diff --git a/chrome/browser/gtk/tabs/tab_gtk.h b/chrome/browser/gtk/tabs/tab_gtk.h
index 9abe92946cc06c4f97eb3baef566c4c47260fc32..384f7f6c945a235411a13521e3462a804d7984bc 100644
--- a/chrome/browser/gtk/tabs/tab_gtk.h
+++ b/chrome/browser/gtk/tabs/tab_gtk.h
@@ -5,6 +5,7 @@
 #ifndef CHROME_BROWSER_GTK_TABS_TAB_GTK_H_
 #define CHROME_BROWSER_GTK_TABS_TAB_GTK_H_
 
+#include "app/theme_provider.h"
 #include "base/basictypes.h"
 #include "base/message_loop.h"
 #include "chrome/browser/gtk/tabs/tab_renderer_gtk.h"
@@ -14,6 +15,8 @@ namespace gfx {
 class Path;
 }
 
+class ThemeProvider;
+
 class TabGtk : public TabRendererGtk,
                public MessageLoopForUI::Observer {
  public:
@@ -64,9 +67,12 @@ class TabGtk : public TabRendererGtk,
     // itself should move the window in cases where there's only one
     // non drag-able Tab.
     virtual bool HasAvailableDragActions() const = 0;
+
+    // Returns the theme provider for icons and colors.
+    virtual ThemeProvider* GetThemeProvider() = 0;
   };
 
-  explicit TabGtk(TabDelegate* delegate);
+  TabGtk(TabDelegate* delegate);
   virtual ~TabGtk();
 
   // Access the delegate.