Add builders for tracing event's structural arguments

cc/quads/content_draw_quad_base.cc

 // Copyright 2013 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/content_draw_quad_base.h"
 
+#include "base/debug/trace_event_argument.h"
 #include "base/logging.h"
 #include "base/values.h"
 #include "cc/base/math_util.h"
 
 namespace cc {
 
 ContentDrawQuadBase::ContentDrawQuadBase()
     : swizzle_contents(false) {
 }
 
@@ skipping 25 matching lines @@
                                  const gfx::RectF& tex_coord_rect,
                                  const gfx::Size& texture_size,
                                  bool swizzle_contents) {
   DrawQuad::SetAll(shared_quad_state, material, rect, opaque_rect,
                    visible_rect, needs_blending);
   this->tex_coord_rect = tex_coord_rect;
   this->texture_size = texture_size;
   this->swizzle_contents = swizzle_contents;
 }
 
-void ContentDrawQuadBase::ExtendValue(base::DictionaryValue* value) const {
-  value->Set("tex_coord_rect", MathUtil::AsValue(tex_coord_rect).release());
-  value->Set("texture_size", MathUtil::AsValue(texture_size).release());
+void ContentDrawQuadBase::ExtendValue(base::debug::TracedValue* value) const {
+  value->BeginArray("tex_coord_rect");
+  MathUtil::AddToTracedValue(tex_coord_rect, value);
+  value->EndArray();
+
+  value->BeginDictionary("texture_size");
+  MathUtil::AddToTracedValue(texture_size, value);
+  value->EndDictionary();
+
   value->SetBoolean("swizzle_contents", swizzle_contents);
 }
 
 }  // namespace cc