Add builders for tracing event's structural arguments

cc/layers/tiled_layer_impl.cc

 // Copyright 2011 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/layers/tiled_layer_impl.h"
 
 #include "base/basictypes.h"
+#include "base/debug/trace_event_argument.h"
 #include "base/strings/stringprintf.h"
 #include "cc/base/math_util.h"
 #include "cc/debug/debug_colors.h"
 #include "cc/layers/append_quads_data.h"
 #include "cc/quads/checkerboard_draw_quad.h"
 #include "cc/quads/debug_border_draw_quad.h"
 #include "cc/quads/solid_color_draw_quad.h"
 #include "cc/quads/tile_draw_quad.h"
 #include "cc/resources/layer_tiling_data.h"
 #include "cc/trees/occlusion_tracker.h"
@@ skipping 74 matching lines @@
                                               float* width) const {
   *color = DebugColors::TiledContentLayerBorderColor();
   *width = DebugColors::TiledContentLayerBorderWidth(layer_tree_impl());
 }
 
 scoped_ptr<LayerImpl> TiledLayerImpl::CreateLayerImpl(
     LayerTreeImpl* tree_impl) {
   return TiledLayerImpl::Create(tree_impl, id()).PassAs<LayerImpl>();
 }
 
-void TiledLayerImpl::AsValueInto(base::DictionaryValue* state) const {
+void TiledLayerImpl::AsValueInto(base::debug::TracedValue* state) const {
   LayerImpl::AsValueInto(state);
-  state->Set("invalidation", MathUtil::AsValue(update_rect()).release());
+  state->BeginArray("invalidation");
+  MathUtil::AddToTracedValue(update_rect(), state);
+  state->EndArray();
 }
 
 size_t TiledLayerImpl::GPUMemoryUsageInBytes() const {
   size_t amount = 0;
   const size_t kMemoryUsagePerTileInBytes =
       4 * tiler_->tile_size().width() * tiler_->tile_size().height();
   for (LayerTilingData::TileMap::const_iterator iter = tiler_->tiles().begin();
        iter != tiler_->tiles().end();
        ++iter) {
     const DrawableTile* tile = static_cast<DrawableTile*>(iter->second);
@@ skipping 193 matching lines @@
 
 void TiledLayerImpl::ReleaseResources() {
   tiler_->reset();
 }
 
 const char* TiledLayerImpl::LayerTypeAsString() const {
   return "cc::TiledLayerImpl";
 }
 
 }  // namespace cc