Replaced RefPtr::release with std::move in Source/core.

third_party/WebKit/Source/core/frame/ImageBitmap.cpp

 // Copyright 2013 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 "core/frame/ImageBitmap.h"
 
 #include "core/html/HTMLCanvasElement.h"
 #include "core/html/HTMLVideoElement.h"
 #include "core/html/ImageData.h"
 #include "core/offscreencanvas/OffscreenCanvas.h"
@@ skipping 934 matching lines @@
 }
 
 ImageBitmap::ImageBitmap(PassRefPtr<StaticBitmapImage> image) {
   m_image = image;
 }
 
 PassRefPtr<StaticBitmapImage> ImageBitmap::transfer() {
   ASSERT(!isNeutered());
   m_isNeutered = true;
   m_image->transfer();
-  return m_image.release();
+  return std::move(m_image);
 }
 
 ImageBitmap::~ImageBitmap() {}
 
 ImageBitmap* ImageBitmap::create(HTMLImageElement* image,
                                  Optional<IntRect> cropRect,
                                  Document* document,
                                  const ImageBitmapOptions& options) {
   return new ImageBitmap(image, cropRect, document, options);
 }
@@ skipping 129 matching lines @@
 void ImageBitmap::adjustDrawRects(FloatRect* srcRect,
                                   FloatRect* dstRect) const {}
 
 FloatSize ImageBitmap::elementSize(const FloatSize&) const {
   return FloatSize(width(), height());
 }
 
 DEFINE_TRACE(ImageBitmap) {}
 
 }  // namespace blink