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

chrome/browser/gtk/tabs/tab_strip_gtk.cc

 // 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.
 
 #include "chrome/browser/gtk/tabs/tab_strip_gtk.h"
 
 #include <algorithm>
 
 #include "app/gfx/canvas_paint.h"
 #include "app/l10n_util.h"
@@ skipping 1070 matching lines @@
 }
 
 bool TabStripGtk::EndDrag(bool canceled) {
   return drag_controller_.get() ? drag_controller_->EndDrag(canceled) : false;
 }
 
 bool TabStripGtk::HasAvailableDragActions() const {
   return model_->delegate()->GetDragActions() != 0;
 }
 
+ThemeProvider* TabStripGtk::GetThemeProvider() {
+  return theme_provider_;
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 // TabStripGtk, MessageLoop::Observer implementation:
 
 void TabStripGtk::WillProcessEvent(GdkEvent* event) {
   // Nothing to do.
 }
 
 void TabStripGtk::DidProcessEvent(GdkEvent* event) {
   switch (event->type) {
     case GDK_MOTION_NOTIFY:
@@ skipping 807 matching lines @@
   message.set_type(TabOverviewTypes::Message::WM_SWITCH_TO_OVERVIEW_MODE);
   GtkWidget* browser_widget = GTK_WIDGET(
       static_cast<BrowserWindowGtk*>(browser->window())->GetNativeHandle());
   message.set_param(0, x11_util::GetX11WindowFromGtkWidget(browser_widget));
   TabOverviewTypes::instance()->SendMessage(message);
 
   UserMetrics::RecordAction(L"TabOverview_PressedTabOverviewButton",
                             tabstrip->model_->profile());
 }
 #endif