cc: Add base64 encoding to picture

cc/resources/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_RESOURCES_PICTURE_H_
 #define CC_RESOURCES_PICTURE_H_
 
 #include <list>
+#include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "cc/base/cc_export.h"
 #include "skia/ext/lazy_pixel_ref.h"
 #include "skia/ext/refptr.h"
 #include "third_party/skia/include/core/SkPixelRef.h"
 #include "third_party/skia/include/core/SkTileGridPicture.h"
 #include "ui/gfx/rect.h"
@@ skipping 33 matching lines @@
   // Apply this contents scale and raster the content rect into the canvas.
   void Raster(SkCanvas* canvas,
               gfx::Rect content_rect,
               float contents_scale,
               bool enable_lcd_text);
 
   void GatherPixelRefs(
       const gfx::Rect& layer_rect,
       std::list<skia::LazyPixelRef*>& pixel_ref_list);
 
+  void AsBase64String(std::string* output) const;
+  void SetPictureFromBase64String(const std::string& encoded);

[nduca, 2013/04/18 19:43:48]

Does this include set layer_rect and opaque_rect? Should it?

What if the SetPictureFromBase64String fails?

+
  private:
   explicit Picture(gfx::Rect layer_rect);
   // This constructor assumes SkPicture is already ref'd and transfers
   // ownership to this picture.
   Picture(const skia::RefPtr<SkPicture>&,
           gfx::Rect layer_rect,
           gfx::Rect opaque_rect);
   ~Picture();
 
   gfx::Rect layer_rect_;
   gfx::Rect opaque_rect_;
   skia::RefPtr<SkPicture> picture_;
 
   typedef std::vector<scoped_refptr<Picture> > PictureVector;
   PictureVector clones_;
 
   friend class base::RefCountedThreadSafe<Picture>;
   DISALLOW_COPY_AND_ASSIGN(Picture);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_PICTURE_H_