tracing: Make ConvertableToTraceFormat move-only scoped_ptr

components/exo/sub_surface.cc

 // Copyright 2015 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 "components/exo/sub_surface.h"
 
 #include "base/logging.h"
 #include "base/trace_event/trace_event.h"
 #include "base/trace_event/trace_event_argument.h"
 #include "components/exo/surface.h"
@@ skipping 62 matching lines @@
   parent_->PlaceSubSurfaceBelow(surface_, sibling);
 }
 
 void SubSurface::SetCommitBehavior(bool synchronized) {
   TRACE_EVENT1("exo", "SubSurface::SetCommitBehavior", "synchronized",
                synchronized);
 
   is_synchronized_ = synchronized;
 }
 
-scoped_refptr<base::trace_event::TracedValue> SubSurface::AsTracedValue()
-    const {
-  scoped_refptr<base::trace_event::TracedValue> value =
-      new base::trace_event::TracedValue;
+scoped_ptr<base::trace_event::TracedValue> SubSurface::AsTracedValue() const {
+  auto value = make_scoped_ptr(new base::trace_event::TracedValue);
   value->SetBoolean("is_synchronized", is_synchronized_);
   return value;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // SurfaceDelegate overrides:
 
 void SubSurface::OnSurfaceCommit() {
   // Early out if commit should be synchronized with parent.
   if (IsSurfaceSynchronized())
@@ skipping 20 matching lines @@
     parent_ = nullptr;
     return;
   }
   DCHECK(surface == surface_);
   if (parent_)
     parent_->RemoveSubSurface(surface_);
   surface_ = nullptr;
 }
 
 }  // namespace exo