tracing: Make ConvertableToTraceFormat move-only scoped_ptr

cc/output/begin_frame_args.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/output/begin_frame_args.h"
 
 #include "base/trace_event/trace_event_argument.h"
 #include "cc/proto/base_conversions.h"
 #include "cc/proto/begin_main_frame_and_commit_state.pb.h"
 
@@ skipping 80 matching lines @@
   DCHECK_NE(type, BeginFrameArgs::BEGIN_FRAME_ARGS_TYPE_MAX);
 #ifdef NDEBUG
   return BeginFrameArgs(frame_time, deadline, interval, type);
 #else
   BeginFrameArgs args = BeginFrameArgs(frame_time, deadline, interval, type);
   args.created_from = location;
   return args;
 #endif
 }
 
-scoped_refptr<base::trace_event::ConvertableToTraceFormat>
+scoped_ptr<base::trace_event::ConvertableToTraceFormat>
 BeginFrameArgs::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 BeginFrameArgs::AsValueInto(base::trace_event::TracedValue* state) const {
   state->SetString("type", "BeginFrameArgs");
   state->SetString("subtype", TypeToString(type));
   state->SetDouble("frame_time_us", frame_time.ToInternalValue());
   state->SetDouble("deadline_us", deadline.ToInternalValue());
   state->SetDouble("interval_us", interval.InMicroseconds());
 #ifndef NDEBUG
   state->SetString("created_from", created_from.ToString());
@@ skipping 25 matching lines @@
 // output.
 base::TimeDelta BeginFrameArgs::DefaultEstimatedParentDrawTime() {
   return base::TimeDelta::FromMicroseconds(16666 / 3);
 }
 
 base::TimeDelta BeginFrameArgs::DefaultInterval() {
   return base::TimeDelta::FromMicroseconds(16666);
 }
 
 }  // namespace cc