cc: Compute animation scale on demand

cc/layers/draw_properties.h

Index: cc/layers/draw_properties.h
diff --git a/cc/layers/draw_properties.h b/cc/layers/draw_properties.h
index 9dee31b45b88fac16cf379ac6558703bf2134baa..d16b40b234c22a502722ef0b0c27365aec77c37c 100644
--- a/cc/layers/draw_properties.h
+++ b/cc/layers/draw_properties.h
@@ -56,14 +56,6 @@ struct CC_EXPORT DrawProperties {
   // 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