Add builders for tracing event's structural arguments

cc/quads/shared_quad_state.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/quads/shared_quad_state.h"
 
+#include "base/debug/trace_event_argument.h"
 #include "base/values.h"
 #include "cc/base/math_util.h"
 #include "cc/debug/traced_value.h"
 
 namespace cc {
 
 SharedQuadState::SharedQuadState()
     : is_clipped(false),
       opacity(0.f),
       blend_mode(SkXfermode::kSrcOver_Mode),
@@ skipping 21 matching lines @@
   this->content_to_target_transform = content_to_target_transform;
   this->content_bounds = content_bounds;
   this->visible_content_rect = visible_content_rect;
   this->clip_rect = clip_rect;
   this->is_clipped = is_clipped;
   this->opacity = opacity;
   this->blend_mode = blend_mode;
   this->sorting_context_id = sorting_context_id;
 }
 
-scoped_ptr<base::Value> SharedQuadState::AsValue() const {
-  scoped_ptr<base::DictionaryValue> value(new base::DictionaryValue());
-  value->Set("transform",
-             MathUtil::AsValue(content_to_target_transform).release());
-  value->Set("layer_content_bounds",
-             MathUtil::AsValue(content_bounds).release());
-  value->Set("layer_visible_content_rect",
-             MathUtil::AsValue(visible_content_rect).release());
+void SharedQuadState::AsValueInto(base::debug::TracedValue* value) const {
+  value->BeginArray("transform");
+  MathUtil::AddToTracedValue(content_to_target_transform, value);
+  value->EndArray();
+
+  value->BeginDictionary("layer_content_bounds");
+  MathUtil::AddToTracedValue(content_bounds, value);
+  value->EndDictionary();
+
+  value->BeginArray("layer_visible_content_rect");
+  MathUtil::AddToTracedValue(visible_content_rect, value);
+  value->EndArray();
+
   value->SetBoolean("is_clipped", is_clipped);
-  value->Set("clip_rect", MathUtil::AsValue(clip_rect).release());
+
+  value->BeginArray("clip_rect");
+  MathUtil::AddToTracedValue(clip_rect, value);
+  value->EndArray();
+
   value->SetDouble("opacity", opacity);
   value->SetString("blend_mode", SkXfermode::ModeName(blend_mode));
   TracedValue::MakeDictIntoImplicitSnapshotWithCategory(
       TRACE_DISABLED_BY_DEFAULT("cc.debug.quads"),
-      value.get(), "cc::SharedQuadState", this);
-  return value.PassAs<base::Value>();
+      value,
+      "cc::SharedQuadState",
+      this);
 }
 
 }  // namespace cc