Add builders for tracing event's structural arguments

cc/resources/picture.cc

 // 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.
 
 #include "cc/resources/picture.h"
 
 #include <algorithm>
 #include <limits>
 #include <set>
 
 #include "base/base64.h"
 #include "base/debug/trace_event.h"
+#include "base/debug/trace_event_argument.h"
 #include "base/values.h"
 #include "cc/base/math_util.h"
 #include "cc/base/util.h"
 #include "cc/debug/traced_picture.h"
 #include "cc/debug/traced_value.h"
 #include "cc/layers/content_layer_client.h"
 #include "skia/ext/pixel_ref_utils.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/skia/include/core/SkData.h"
 #include "third_party/skia/include/core/SkDrawFilter.h"
@@ skipping 556 matching lines @@
     // We found a non-empty list: store it and get the first pixel ref.
     current_pixel_refs_ = &iter->second;
     current_index_ = 0;
     break;
   }
   return *this;
 }
 
 scoped_refptr<base::debug::ConvertableToTraceFormat>
     Picture::AsTraceableRasterData(float scale) const {
-  scoped_ptr<base::DictionaryValue> raster_data(new base::DictionaryValue());
-  raster_data->Set("picture_id", TracedValue::CreateIDRef(this).release());
+  scoped_refptr<base::debug::TracedValue> raster_data =
+      new base::debug::TracedValue();
+  TracedValue::SetIDRef(this, raster_data.get(), "picture_id");
   raster_data->SetDouble("scale", scale);
-  return TracedValue::FromValue(raster_data.release());
+  return raster_data;
 }
 
 scoped_refptr<base::debug::ConvertableToTraceFormat>
     Picture::AsTraceableRecordData() const {
-  scoped_ptr<base::DictionaryValue> record_data(new base::DictionaryValue());
-  record_data->Set("picture_id", TracedValue::CreateIDRef(this).release());
-  record_data->Set("layer_rect", MathUtil::AsValue(layer_rect_).release());
-  return TracedValue::FromValue(record_data.release());
+  scoped_refptr<base::debug::TracedValue> record_data =
+      new base::debug::TracedValue();
+  TracedValue::SetIDRef(this, record_data.get(), "picture_id");
+  record_data->BeginArray("layer_rect");
+  MathUtil::AddToTracedValue(layer_rect_, record_data.get());
+  record_data->EndArray();
+  return record_data;
 }
 
 }  // namespace cc