Add builders for tracing event's structural arguments

cc/quads/io_surface_draw_quad.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/io_surface_draw_quad.h"
 
+#include "base/debug/trace_event_argument.h"
 #include "base/logging.h"
 #include "base/values.h"
 #include "cc/base/math_util.h"
 
 namespace cc {
 
 IOSurfaceDrawQuad::IOSurfaceDrawQuad()
     : io_surface_resource_id(0),
       orientation(FLIPPED) {
 }
@@ skipping 32 matching lines @@
     const ResourceIteratorCallback& callback) {
   io_surface_resource_id = callback.Run(io_surface_resource_id);
 }
 
 const IOSurfaceDrawQuad* IOSurfaceDrawQuad::MaterialCast(
     const DrawQuad* quad) {
   DCHECK(quad->material == DrawQuad::IO_SURFACE_CONTENT);
   return static_cast<const IOSurfaceDrawQuad*>(quad);
 }
 
-void IOSurfaceDrawQuad::ExtendValue(base::DictionaryValue* value) const {
-  value->Set("io_surface_size", MathUtil::AsValue(io_surface_size).release());
+void IOSurfaceDrawQuad::ExtendValue(base::debug::TracedValue* value) const {
+  value->BeginDictionary("io_surface_size");
+  MathUtil::AddToTracedValue(io_surface_size, value);
+  value->EndDictionary();
+
   value->SetInteger("io_surface_resource_id", io_surface_resource_id);
   const char* orientation_string = NULL;
   switch (orientation) {
     case FLIPPED:
       orientation_string = "flipped";
       break;
     case UNFLIPPED:
       orientation_string = "unflipped";
       break;
   }
 
   value->SetString("orientation", orientation_string);
 }
 
 }  // namespace cc