Move skia to DEPS, and put it in third_party.

views/controls/button/image_button.h

 // Copyright (c) 2006-2008 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 VIEWS_CONTROLS_BUTTON_IMAGE_BUTTON_H_
 #define VIEWS_CONTROLS_BUTTON_IMAGE_BUTTON_H_
 
-#include "skia/include/SkBitmap.h"
+#include "third_party/skia/include/core/SkBitmap.h"
 #include "views/controls/button/custom_button.h"
 
 namespace views {
 
 // An image button.
 class ImageButton : public CustomButton {
  public:
   explicit ImageButton(ButtonListener* listener);
   virtual ~ImageButton();
 
@@ skipping 73 matching lines @@
   // The parent class's tooltip_text_ is displayed when not toggled, and
   // this one is shown when toggled.
   std::wstring toggled_tooltip_text_;
 
   DISALLOW_EVIL_CONSTRUCTORS(ToggleImageButton);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_CONTROLS_BUTTON_IMAGE_BUTTON_H_