cc: Use skia::RefPtr in place of raw pointers and SkAutoTUnref.

cc/picture.h

 // Copyright 2012 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 CC_PICTURE_H_
 #define CC_PICTURE_H_
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "cc/cc_export.h"
+#include "skia/ext/refptr.h"
 #include "third_party/skia/include/core/SkPicture.h"
 #include "ui/gfx/rect.h"
 
 namespace cc {
 
 class ContentLayerClient;
 struct RenderingStats;
 
 class CC_EXPORT Picture
     : public base::RefCountedThreadSafe<Picture> {
@@ skipping 11 matching lines @@
   void Record(ContentLayerClient*, gfx::Rect layer_rect, RenderingStats&);
 
   // Raster this Picture's layer_rect into the given canvas.
   // Assumes contentsScale have already been applied.
   void Raster(SkCanvas* canvas);
 
 private:
   Picture();
   // This constructor assumes SkPicture is already ref'd and transfers
   // ownership to this picture.
-  Picture(SkPicture*, gfx::Rect layer_rect, gfx::Rect opaque_rect);
+  Picture(const skia::RefPtr<SkPicture>&,
+          gfx::Rect layer_rect,
+          gfx::Rect opaque_rect);
   ~Picture();
 
   gfx::Rect layer_rect_;
   gfx::Rect opaque_rect_;
-  SkAutoTUnref<SkPicture> picture_;
+  skia::RefPtr<SkPicture> picture_;
 
   friend class base::RefCountedThreadSafe<Picture>;
   DISALLOW_COPY_AND_ASSIGN(Picture);
 };
 
 }  // namespace cc
 
 #endif  // CC_PICTURE_H_