Add builders for tracing event's structural arguments

cc/scheduler/scheduler_settings.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/scheduler/scheduler_settings.h"
 
+#include "base/debug/trace_event_argument.h"
 #include "cc/trees/layer_tree_settings.h"
 
 namespace cc {
 
 SchedulerSettings::SchedulerSettings()
     : begin_frame_scheduling_enabled(true),
       main_frame_before_draw_enabled(true),
       main_frame_before_activation_enabled(false),
       impl_side_painting(false),
       timeout_and_draw_when_animation_checkerboards(true),
@@ skipping 12 matching lines @@
           settings.timeout_and_draw_when_animation_checkerboards),
       maximum_number_of_failed_draws_before_draw_is_forced_(
           settings.maximum_number_of_failed_draws_before_draw_is_forced_),
       using_synchronous_renderer_compositor(
           settings.using_synchronous_renderer_compositor),
       throttle_frame_production(settings.throttle_frame_production) {
 }
 
 SchedulerSettings::~SchedulerSettings() {}
 
-scoped_ptr<base::Value> SchedulerSettings::AsValue() const {
-  scoped_ptr<base::DictionaryValue> state(new base::DictionaryValue);
+scoped_refptr<base::debug::ConvertableToTraceFormat>
+SchedulerSettings::AsValue() const {
+  scoped_refptr<base::debug::TracedValue> state =
+      new base::debug::TracedValue();
   state->SetBoolean("begin_frame_scheduling_enabled",
                     begin_frame_scheduling_enabled);
   state->SetBoolean("main_frame_before_draw_enabled",
                     main_frame_before_draw_enabled);
   state->SetBoolean("main_frame_before_activation_enabled",
                     main_frame_before_activation_enabled);
   state->SetBoolean("impl_side_painting", impl_side_painting);
   state->SetBoolean("timeout_and_draw_when_animation_checkerboards",
                     timeout_and_draw_when_animation_checkerboards);
   state->SetInteger("maximum_number_of_failed_draws_before_draw_is_forced_",
                     maximum_number_of_failed_draws_before_draw_is_forced_);
   state->SetBoolean("using_synchronous_renderer_compositor",
                     using_synchronous_renderer_compositor);
   state->SetBoolean("throttle_frame_production", throttle_frame_production);
-  return state.PassAs<base::Value>();
+  return state;
 }
 
 }  // namespace cc