Add builders for tracing event's structural arguments

cc/debug/rendering_stats.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_DEBUG_RENDERING_STATS_H_
 #define CC_DEBUG_RENDERING_STATS_H_
 
 #include <list>
 
 #include "base/basictypes.h"
+#include "base/debug/trace_event_argument.h"
 #include "base/time/time.h"
 #include "base/values.h"
 #include "cc/base/cc_export.h"
 #include "cc/debug/traced_value.h"
 
 namespace cc {
 
 struct CC_EXPORT RenderingStats {
   // Stores a sequence of TimeDelta objects.
   class CC_EXPORT TimeDeltaList {
    public:
     TimeDeltaList();
     ~TimeDeltaList();
 
     void Append(base::TimeDelta value);
-    scoped_ptr<base::ListValue> AsListValueInMilliseconds() const;
+    void AddToTracedValue(base::debug::TracedValue* list_value) const;
+
     void Add(const TimeDeltaList& other);
 
    private:
     std::list<base::TimeDelta> values;
   };
 
   struct CC_EXPORT MainThreadRenderingStats {
     // Note: when adding new members, please remember to update Add in
     // rendering_stats.cc.
 
@@ skipping 38 matching lines @@
   MainThreadRenderingStats main_stats;
   ImplThreadRenderingStats impl_stats;
 
   // Add fields of |other| to the fields in this structure.
   void Add(const RenderingStats& other);
 };
 
 }  // namespace cc
 
 #endif  // CC_DEBUG_RENDERING_STATS_H_