Add builders for tracing event's structural arguments

cc/resources/tile.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/tile.h"
 
 #include <algorithm>
 
+#include "base/debug/trace_event_argument.h"
 #include "cc/base/math_util.h"
 #include "cc/debug/traced_value.h"
 #include "cc/resources/tile_manager.h"
 #include "third_party/khronos/GLES2/gl2.h"
 
 namespace cc {
 
 Tile::Id Tile::s_next_id_ = 0;
 
 Tile::Tile(TileManager* tile_manager,
@@ skipping 35 matching lines @@
 }
 
 void Tile::MarkRequiredForActivation() {
   if (priority_[PENDING_TREE].required_for_activation)
     return;
 
   priority_[PENDING_TREE].required_for_activation = true;
   tile_manager_->DidChangeTilePriority(this);
 }
 
-scoped_ptr<base::Value> Tile::AsValue() const {
-  scoped_ptr<base::DictionaryValue> res(new base::DictionaryValue());
+void Tile::AsValueInto(base::debug::TracedValue* res) const {
   TracedValue::MakeDictIntoImplicitSnapshotWithCategory(
-      TRACE_DISABLED_BY_DEFAULT("cc.debug"), res.get(), "cc::Tile", this);
-  res->Set("picture_pile",
-           TracedValue::CreateIDRef(picture_pile_.get()).release());
+      TRACE_DISABLED_BY_DEFAULT("cc.debug"), res, "cc::Tile", this);
+  TracedValue::SetIDRef(picture_pile_.get(), res, "picture_pile");
   res->SetDouble("contents_scale", contents_scale_);
-  res->Set("content_rect", MathUtil::AsValue(content_rect_).release());
+
+  res->BeginArray("content_rect");
+  MathUtil::AddToTracedValue(content_rect_, res);
+  res->EndArray();
+
   res->SetInteger("layer_id", layer_id_);
-  res->Set("active_priority", priority_[ACTIVE_TREE].AsValue().release());
-  res->Set("pending_priority", priority_[PENDING_TREE].AsValue().release());
-  res->Set("managed_state", managed_state_.AsValue().release());
+
+  res->BeginDictionary("active_priority");
+  priority_[ACTIVE_TREE].AsValueInto(res);
+  res->EndDictionary();
+
+  res->BeginDictionary("pending_priority");
+  priority_[PENDING_TREE].AsValueInto(res);
+  res->EndDictionary();
+
+  res->BeginDictionary("managed_state");
+  managed_state_.AsValueInto(res);
+  res->EndDictionary();
+
   res->SetBoolean("use_picture_analysis", use_picture_analysis());
-  return res.PassAs<base::Value>();
 }
 
 size_t Tile::GPUMemoryUsageInBytes() const {
   size_t total_size = 0;
   for (int mode = 0; mode < NUM_RASTER_MODES; ++mode)
     total_size += managed_state_.tile_versions[mode].GPUMemoryUsageInBytes();
   return total_size;
 }
 
 RasterMode Tile::DetermineRasterModeForTree(WhichTree tree) const {
   return DetermineRasterModeForResolution(priority(tree).resolution);
 }
 
 RasterMode Tile::DetermineOverallRasterMode() const {
   return DetermineRasterModeForResolution(managed_state_.resolution);
 }
 
 RasterMode Tile::DetermineRasterModeForResolution(
     TileResolution resolution) const {
   RasterMode current_mode = managed_state_.raster_mode;
   RasterMode raster_mode = resolution == LOW_RESOLUTION
                                ? LOW_QUALITY_RASTER_MODE
                                : HIGH_QUALITY_RASTER_MODE;
   return std::min(raster_mode, current_mode);
 }
 
 }  // namespace cc