tracing: Make ConvertableToTraceFormat move-only scoped_ptr

cc/scheduler/begin_frame_source_unittest.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/begin_frame_source.h"
 
 #include <stdint.h>
 
 #include "base/test/test_simple_task_runner.h"
 #include "cc/test/begin_frame_args_test.h"
@@ skipping 181 matching lines @@
   void OnBeginFrameSourcePausedChanged(bool paused) override {}
 };
 
 TEST(BeginFrameSourceBaseTest, DetectAsValueIntoLoop) {
   LoopingBeginFrameObserver obs;
   FakeBeginFrameSource source;
 
   obs.source_ = &source;
   source.AddObserver(&obs);
 
-  scoped_refptr<base::trace_event::TracedValue> state =
-      new base::trace_event::TracedValue();
+  scoped_ptr<base::trace_event::TracedValue> state(
+      new base::trace_event::TracedValue());
   source.AsValueInto(state.get());
 }
 
 // BackToBackBeginFrameSource testing -----------------------------------------
 class TestBackToBackBeginFrameSource : public BackToBackBeginFrameSource {
  public:
   static scoped_ptr<TestBackToBackBeginFrameSource> Create(
       base::SimpleTestTickClock* now_src,
       base::SingleThreadTaskRunner* task_runner) {
     return make_scoped_ptr(
@@ skipping 684 matching lines @@
   Mock::VerifyAndClearExpectations(&obs);
   source1_->SetBeginFrameSourcePaused(true);
 
   // Paused to paused.
   mux_->SetActiveSource(source1_);
   Mock::VerifyAndClearExpectations(&obs);
 }
 
 }  // namespace
 }  // namespace cc