Implement HiDPI and pinch-zoom scaling of filter params

cc/layers/render_surface_impl.cc

 // Copyright 2011 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/layers/render_surface_impl.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/strings/stringprintf.h"
@@ skipping 206 matching lines @@
         uv_scale_y * content_rect_.y() / content_rect_.height(),
         uv_scale_x,
         uv_scale_y);
   }
 
   ResourceProvider::ResourceId mask_resource_id =
       mask_layer ? mask_layer->ContentsResourceId() : 0;
   gfx::Rect contents_changed_since_last_frame =
       ContentsChanged() ? content_rect_ : gfx::Rect();
 
+  DCHECK(owning_layer_->draw_properties().target_space_transform.IsScale2d());
+  gfx::Vector2dF owning_layer_to_target_scale =
+      owning_layer_->draw_properties().target_space_transform.Scale2d();
+  owning_layer_to_target_scale.Scale(owning_layer_->contents_scale_x(),
+                                     owning_layer_->contents_scale_y());
+
   RenderPassDrawQuad* quad =
       render_pass->CreateAndAppendDrawQuad<RenderPassDrawQuad>();
   quad->SetNew(shared_quad_state,
                content_rect_,
                visible_content_rect,
                render_pass_id,
                for_replica,
                mask_resource_id,
                contents_changed_since_last_frame,
                mask_uv_rect,
                owning_layer_->filters(),
+               owning_layer_to_target_scale,
                owning_layer_->background_filters());
 }
 
 }  // namespace cc