Replaced PassRefPtr copies with moves in Source/platform.

third_party/WebKit/Source/platform/graphics/paint/DrawingDisplayItem.h

 // Copyright 2014 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.
 
 #ifndef DrawingDisplayItem_h
 #define DrawingDisplayItem_h
 
 #include "platform/PlatformExport.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/geometry/FloatPoint.h"
 #include "platform/graphics/paint/DisplayItem.h"
 #include "third_party/skia/include/core/SkPicture.h"
 #include "third_party/skia/include/core/SkRefCnt.h"
 
 namespace blink {
 
 class PLATFORM_EXPORT DrawingDisplayItem final : public DisplayItem {
 public:
     DrawingDisplayItem(const DisplayItemClient& client, Type type, sk_sp<const SkPicture> picture, bool knownToBeOpaque = false)
         : DisplayItem(client, type, sizeof(*this))
-        , m_picture(picture && picture->approximateOpCount() ? picture : nullptr)
+        , m_picture(picture && picture->approximateOpCount() ? std::move(picture) : nullptr)
         , m_knownToBeOpaque(knownToBeOpaque)
     {
         DCHECK(isDrawingType(type));
     }
 
     void replay(GraphicsContext&) const override;
     void appendToWebDisplayItemList(const IntRect&, WebDisplayItemList*) const override;
     bool drawsContent() const override;
 
     const SkPicture* picture() const { return m_picture.get(); }
@@ skipping 10 matching lines @@
 
     sk_sp<const SkPicture> m_picture;
 
     // True if there are no transparent areas. Only used for SlimmingPaintV2.
     const bool m_knownToBeOpaque;
 };
 
 } // namespace blink
 
 #endif // DrawingDisplayItem_h