Remove Layer/LayerImpl's FixedContainerSizeDelta

cc/layers/layer.h

 // Copyright 2010 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_LAYER_H_
 #define CC_LAYERS_LAYER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 145 matching lines @@
   bool contents_opaque() const { return inputs_.contents_opaque; }
 
   void SetPosition(const gfx::PointF& position);
   gfx::PointF position() const { return inputs_.position; }
 
   // A layer that is a container for fixed position layers cannot be both
   // scrollable and have a non-identity transform.
   void SetIsContainerForFixedPositionLayers(bool container);
   bool IsContainerForFixedPositionLayers() const;
 
-  gfx::Vector2dF FixedContainerSizeDelta() const {
-    return gfx::Vector2dF();
-  }
-
   void SetPositionConstraint(const LayerPositionConstraint& constraint);
   const LayerPositionConstraint& position_constraint() const {
     return inputs_.position_constraint;
   }
 
   void SetStickyPositionConstraint(
       const LayerStickyPositionConstraint& constraint);
   const LayerStickyPositionConstraint& sticky_position_constraint() const {
     return inputs_.sticky_position_constraint;
   }
@@ skipping 458 matching lines @@
   // These all act like draw properties, so don't need push properties.
   gfx::Rect visible_layer_rect_;
   size_t num_unclipped_descendants_;
 
   DISALLOW_COPY_AND_ASSIGN(Layer);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_LAYER_H_