Removed local RefPtr objects created from PassRefPtr arguments.

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 946 matching lines @@
   image_ = CropImageAndApplyColorSpaceConversion(
       input.Get(), parsed_options,
       bitmap->IsPremultiplied() ? kPremultiplyAlpha : kDontPremultiplyAlpha,
       ColorBehavior::TransformToGlobalTarget());
   if (!image_)
     return;
   image_->SetOriginClean(bitmap->OriginClean());
   image_->SetPremultiplied(parsed_options.premultiply_alpha);
 }
 
-ImageBitmap::ImageBitmap(PassRefPtr<StaticBitmapImage> image,
+ImageBitmap::ImageBitmap(RefPtr<StaticBitmapImage> image,
                          Optional<IntRect> crop_rect,
                          const ImageBitmapOptions& options) {
   bool origin_clean = image->OriginClean();
-  RefPtr<Image> input = image;
   ParsedOptions parsed_options =
-      ParseOptions(options, crop_rect, input->size());
+      ParseOptions(options, crop_rect, image->size());
   if (DstBufferSizeHasOverflow(parsed_options))
     return;
 
   image_ = CropImageAndApplyColorSpaceConversion(
-      input.Get(), parsed_options, kPremultiplyAlpha,
+      image.Get(), parsed_options, kPremultiplyAlpha,
       ColorBehavior::TransformToGlobalTarget());
   if (!image_)
     return;
 
   image_->SetOriginClean(origin_clean);
   image_->SetPremultiplied(parsed_options.premultiply_alpha);
 }
 
 ImageBitmap::ImageBitmap(PassRefPtr<StaticBitmapImage> image) {
   image_ = std::move(image);
@@ skipping 150 matching lines @@
 void ImageBitmap::AdjustDrawRects(FloatRect* src_rect,
                                   FloatRect* dst_rect) const {}
 
 FloatSize ImageBitmap::ElementSize(const FloatSize&) const {
   return FloatSize(width(), height());
 }
 
 DEFINE_TRACE(ImageBitmap) {}
 
 }  // namespace blink