tracing: Make ConvertableToTraceFormat move-only scoped_ptr

cc/scheduler/scheduler_state_machine.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_state_machine.h"
 
 #include "base/format_macros.h"
 #include "base/logging.h"
 #include "base/strings/stringprintf.h"
 #include "base/trace_event/trace_event.h"
@@ skipping 171 matching lines @@
       return "ACTION_BEGIN_OUTPUT_SURFACE_CREATION";
     case ACTION_PREPARE_TILES:
       return "ACTION_PREPARE_TILES";
     case ACTION_INVALIDATE_OUTPUT_SURFACE:
       return "ACTION_INVALIDATE_OUTPUT_SURFACE";
   }
   NOTREACHED();
   return "???";
 }
 
-scoped_refptr<base::trace_event::ConvertableToTraceFormat>
+scoped_ptr<base::trace_event::ConvertableToTraceFormat>
 SchedulerStateMachine::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 SchedulerStateMachine::AsValueInto(
     base::trace_event::TracedValue* state) const {
   state->BeginDictionary("major_state");
   state->SetString("next_action", ActionToString(NextAction()));
   state->SetString("begin_impl_frame_state",
                    BeginImplFrameStateToString(begin_impl_frame_state_));
   state->SetString("begin_main_frame_state",
                    BeginMainFrameStateToString(begin_main_frame_state_));
@@ skipping 934 matching lines @@
     case OUTPUT_SURFACE_ACTIVE:
     case OUTPUT_SURFACE_WAITING_FOR_FIRST_COMMIT:
     case OUTPUT_SURFACE_WAITING_FOR_FIRST_ACTIVATION:
       return true;
   }
   NOTREACHED();
   return false;
 }
 
 }  // namespace cc