Add builders for tracing event's structural arguments

cc/resources/picture_pile_base.h

 // Copyright 2013 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_PILE_BASE_H_
 #define CC_RESOURCES_PICTURE_PILE_BASE_H_
 
 #include <bitset>
 #include <list>
 #include <utility>
 
 #include "base/containers/hash_tables.h"
 #include "base/memory/ref_counted.h"
 #include "cc/base/cc_export.h"
 #include "cc/base/region.h"
 #include "cc/base/tiling_data.h"
 #include "cc/resources/picture.h"
 #include "ui/gfx/size.h"
 
 namespace base {
+namespace debug {
+class TracedValue;
+}
 class Value;
 }
 
 namespace cc {
 
 class CC_EXPORT PicturePileBase : public base::RefCounted<PicturePileBase> {
  public:
   PicturePileBase();
   explicit PicturePileBase(const PicturePileBase* other);
   PicturePileBase(const PicturePileBase* other, unsigned thread_index);
@@ skipping 14 matching lines @@
 
   // If this pile contains any valid recordings. May have false positives.
   bool HasRecordings() const { return has_any_recordings_; }
 
   static void ComputeTileGridInfo(const gfx::Size& tile_grid_size,
                                   SkTileGridFactory::TileGridInfo* info);
 
   void SetTileGridSize(const gfx::Size& tile_grid_size);
   TilingData& tiling() { return tiling_; }
 
-  scoped_ptr<base::Value> AsValue() const;
+  void AsValueInto(base::debug::TracedValue* array) const;
 
  protected:
   class CC_EXPORT PictureInfo {
    public:
     enum {
       INVALIDATION_FRAMES_TRACKED = 32
     };
 
     PictureInfo();
     ~PictureInfo();
@@ skipping 52 matching lines @@
  private:
   void SetBufferPixels(int buffer_pixels);
 
   friend class base::RefCounted<PicturePileBase>;
   DISALLOW_COPY_AND_ASSIGN(PicturePileBase);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_PICTURE_PILE_BASE_H_