cc: Compute animation scale on demand

cc/layers/draw_properties.h

 // Copyright 2012 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 CC_LAYERS_DRAW_PROPERTIES_H_
 #define CC_LAYERS_DRAW_PROPERTIES_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 38 matching lines @@
   // the layer's coordinate space.
   gfx::Rect visible_layer_rect;
 
   // In target surface space, the rect that encloses the clipped, drawable
   // content of the layer.
   gfx::Rect drawable_content_rect;
 
   // In target surface space, the original rect that clipped this layer. This
   // value is used to avoid unnecessarily changing GL scissor state.
   gfx::Rect clip_rect;
-
-  // The maximum scale during the layers current animation at which content
-  // should be rastered at to be crisp.
-  float maximum_animation_contents_scale;
-
-  // The scale during the layer animation start at which content should be
-  // rastered at to be crisp.
-  float starting_animation_contents_scale;
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_DRAW_PROPERTIES_H_