cc: Remove separate x/y raster scales.

cc/playback/discardable_image_map.cc

 // Copyright 2015 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 "cc/playback/discardable_image_map.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <limits>
@@ skipping 233 matching lines @@
 
 void DiscardableImageMap::EndGeneratingMetadata() {
   images_rtree_.Build(all_images_,
                       [](const std::pair<DrawImage, gfx::Rect>& image) {
                         return image.second;
                       });
 }
 
 void DiscardableImageMap::GetDiscardableImagesInRect(
     const gfx::Rect& rect,
-    const gfx::SizeF& raster_scales,
+    float contents_scale,
     std::vector<DrawImage>* images) const {
   std::vector<size_t> indices;
   images_rtree_.Search(rect, &indices);
   for (size_t index : indices)
-    images->push_back(all_images_[index].first.ApplyScale(raster_scales));
+    images->push_back(all_images_[index].first.ApplyScale(contents_scale));
 }
 
 DiscardableImageMap::ScopedMetadataGenerator::ScopedMetadataGenerator(
     DiscardableImageMap* image_map,
     const gfx::Size& bounds)
     : image_map_(image_map),
       metadata_canvas_(image_map->BeginGeneratingMetadata(bounds)) {}
 
 DiscardableImageMap::ScopedMetadataGenerator::~ScopedMetadataGenerator() {
   image_map_->EndGeneratingMetadata();
 }
 
 }  // namespace cc