Fix CSS reference filters with negative transformed children.

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 291 matching lines @@
     return should_check_backface_visibility_;
   }
 
   virtual void SetLayerTreeHost(LayerTreeHost* host);
 
   void SetIsDrawable(bool is_drawable);
 
   void SetHideLayerAndSubtree(bool hide);
   bool hide_layer_and_subtree() const { return inputs_.hide_layer_and_subtree; }
 
+  void SetFiltersOrigin(const gfx::PointF& origin);
+  gfx::PointF filters_origin() const { return inputs_.filters_origin; }
+
   void SetReplicaLayer(Layer* layer);
   Layer* replica_layer() { return inputs_.replica_layer.get(); }
   const Layer* replica_layer() const { return inputs_.replica_layer.get(); }
 
   bool has_mask() const { return !!inputs_.mask_layer.get(); }
   bool has_replica() const { return !!inputs_.replica_layer.get(); }
   bool replica_has_mask() const {
     return inputs_.replica_layer.get() &&
            (inputs_.mask_layer.get() ||
             inputs_.replica_layer->inputs_.mask_layer.get());
@@ skipping 324 matching lines @@
     // space.  0 is a special value that means this layer will not be sorted
     // and will be drawn in paint order.
     int sorting_context_id;
 
     bool use_parent_backface_visibility : 1;
 
     SkColor background_color;
 
     FilterOperations filters;
     FilterOperations background_filters;
+    gfx::PointF filters_origin;
 
     gfx::ScrollOffset scroll_offset;
 
     // This variable indicates which ancestor layer (if any) whose size,
     // transformed relative to this layer, defines the maximum scroll offset
     // for this layer.
     int scroll_clip_layer_id;
     bool user_scrollable_horizontal : 1;
     bool user_scrollable_vertical : 1;
 
@@ skipping 60 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_