tracing: Make ConvertableToTraceFormat move-only scoped_ptr

cc/scheduler/scheduler.cc

 // Copyright 2011 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.h"
 
 #include <algorithm>
 
 #include "base/auto_reset.h"
 #include "base/logging.h"
@@ skipping 762 matching lines @@
         client_->ScheduledActionInvalidateOutputSurface();
         break;
       }
     }
   } while (action != SchedulerStateMachine::ACTION_NONE);
 
   ScheduleBeginImplFrameDeadlineIfNeeded();
   SetupNextBeginFrameIfNeeded();
 }
 
-scoped_refptr<base::trace_event::ConvertableToTraceFormat> Scheduler::AsValue()
+scoped_ptr<base::trace_event::ConvertableToTraceFormat> Scheduler::AsValue()
     const {
-  scoped_refptr<base::trace_event::TracedValue> state =
-      new base::trace_event::TracedValue();
+  scoped_ptr<base::trace_event::TracedValue> state(
+      new base::trace_event::TracedValue());
   AsValueInto(state.get());
-  return state;
+  return std::move(state);
 }
 
 void Scheduler::AsValueInto(base::trace_event::TracedValue* state) const {
   base::TimeTicks now = Now();
 
   state->BeginDictionary("state_machine");
   state_machine_.AsValueInto(state);
   state->EndDictionary();
 
   // Only trace frame sources when explicitly enabled - http://crbug.com/420607
@@ skipping 112 matching lines @@
 }
 
 bool Scheduler::IsBeginMainFrameSentOrStarted() const {
   return (state_machine_.begin_main_frame_state() ==
               SchedulerStateMachine::BEGIN_MAIN_FRAME_STATE_SENT ||
           state_machine_.begin_main_frame_state() ==
               SchedulerStateMachine::BEGIN_MAIN_FRAME_STATE_STARTED);
 }
 
 }  // namespace cc