tracing: Make ConvertableToTraceFormat move-only scoped_ptr

cc/debug/devtools_instrumentation.h

Index: cc/debug/devtools_instrumentation.h
diff --git a/cc/debug/devtools_instrumentation.h b/cc/debug/devtools_instrumentation.h
index f6eacdc12d4973c7b871aa67127b7f6ad9ee323a..0e15b09bc5742dfb7a420fd29fad81faeb68eeb7 100644
--- a/cc/debug/devtools_instrumentation.h
+++ b/cc/debug/devtools_instrumentation.h
@@ -147,12 +147,11 @@ inline void DidRequestMainThreadFrame(int layer_tree_host_id) {
                        layer_tree_host_id);
 }
 
-inline scoped_refptr<base::trace_event::ConvertableToTraceFormat>
+inline scoped_ptr<base::trace_event::ConvertableToTraceFormat>
 BeginMainThreadFrameData(int frame_id) {
-  scoped_refptr<base::trace_event::TracedValue> value =
-      new base::trace_event::TracedValue();
+  auto value = make_scoped_ptr(new base::trace_event::TracedValue());
   value->SetInteger("frameId", frame_id);
-  return value;
+  return std::move(value);
 }
 
 inline void WillBeginMainThreadFrame(int layer_tree_host_id, int frame_id) {
@@ -162,12 +161,11 @@ inline void WillBeginMainThreadFrame(int layer_tree_host_id, int frame_id) {
       internal::kData, BeginMainThreadFrameData(frame_id));
 }
 
-inline scoped_refptr<base::trace_event::ConvertableToTraceFormat>
+inline scoped_ptr<base::trace_event::ConvertableToTraceFormat>
 NeedsBeginFrameData(bool needs_begin_frame) {
-  scoped_refptr<base::trace_event::TracedValue> value =
-      new base::trace_event::TracedValue();
+  auto value = make_scoped_ptr(new base::trace_event::TracedValue());
   value->SetInteger("needsBeginFrame", needs_begin_frame);
-  return value;
+  return std::move(value);
 }
 
 inline void NeedsBeginFrameChanged(int layer_tree_host_id, bool new_value) {