tracing: Make ConvertableToTraceFormat move-only scoped_ptr

third_party/WebKit/Source/platform/graphics/GraphicsLayer.cpp

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 1219 matching lines @@
 {
     if (m_scrollableArea) {
         DoublePoint newPosition = m_scrollableArea->minimumScrollPosition() + toDoubleSize(m_layer->layer()->scrollPositionDouble());
 
         // FrameView::setScrollPosition doesn't work for compositor commits (interacts poorly with programmatic scroll animations)
         // so we need to use the ScrollableArea version. The FrameView method should go away soon anyway.
         m_scrollableArea->ScrollableArea::setScrollPosition(newPosition, CompositorScroll);
     }
 }
 
-scoped_refptr<base::trace_event::ConvertableToTraceFormat> GraphicsLayer::TakeDebugInfo(cc::Layer* layer)
+scoped_ptr<base::trace_event::ConvertableToTraceFormat> GraphicsLayer::TakeDebugInfo(cc::Layer* layer)
 {
-    scoped_refptr<base::trace_event::TracedValue> tracedValue = m_debugInfo.asTracedValue();
+    scoped_ptr<base::trace_event::TracedValue> tracedValue(m_debugInfo.asTracedValue());
     tracedValue->SetString("layer_name", WTF::StringUTF8Adaptor(debugName(layer)).asStringPiece());
-    return tracedValue;
+    return std::move(tracedValue);
 }
 
 PaintController& GraphicsLayer::paintController()
 {
     RELEASE_ASSERT(drawsContent());
     if (!m_paintController)
         m_paintController = PaintController::create();
     return *m_paintController;
 }
 
@@ skipping 16 matching lines @@
 {
     if (!layer) {
         fprintf(stderr, "Cannot showGraphicsLayerTree for (nil).\n");
         return;
     }
 
     String output = layer->layerTreeAsText(blink::LayerTreeIncludesDebugInfo);
     fprintf(stderr, "%s\n", output.utf8().data());
 }
 #endif