cc: refactor of MathUtil::AddToTracedValue

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"
@@ skipping 40 matching lines @@
   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::debug::TracedValue* value) const {
-  value->BeginDictionary("io_surface_size");
-  MathUtil::AddToTracedValue(io_surface_size, value);
-  value->EndDictionary();
+  MathUtil::AddToTracedValue("io_surface_size", io_surface_size, value);
 
   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