Add a hide_layer_and_subtree() flag to cc::Layer

cc/layers/layer_impl.h

 // 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.
 
 #ifndef CC_LAYERS_LAYER_IMPL_H_
 #define CC_LAYERS_LAYER_IMPL_H_
 
 #include <string>
 
 #include "base/logging.h"
@@ skipping 115 matching lines @@
   virtual RenderPass::Id NextContributingRenderPassId(RenderPass::Id id) const;
 
   virtual void UpdateTilePriorities() {}
 
   virtual ScrollbarLayerImpl* ToScrollbarLayer();
 
   // Returns true if this layer has content to draw.
   void SetDrawsContent(bool draws_content);
   bool DrawsContent() const { return draws_content_; }
 
+  void SetHideLayerAndSubtree(bool hide);
+  bool hide_layer_and_subtree() const { return hide_layer_and_subtree_; }
+
   bool force_render_surface() const { return force_render_surface_; }
   void SetForceRenderSurface(bool force) { force_render_surface_ = force; }
 
   void SetAnchorPoint(gfx::PointF anchor_point);
   gfx::PointF anchor_point() const { return anchor_point_; }
 
   void SetAnchorPointZ(float anchor_point_z);
   float anchor_point_z() const { return anchor_point_z_; }
 
   void SetBackgroundColor(SkColor background_color);
@@ skipping 365 matching lines @@
   bool contents_opaque_;
   float opacity_;
   gfx::PointF position_;
   bool preserves_3d_;
   bool use_parent_backface_visibility_;
   bool draw_checkerboard_for_missing_tiles_;
   gfx::Transform sublayer_transform_;
   gfx::Transform transform_;
 
   bool draws_content_;
+  bool hide_layer_and_subtree_;
   bool force_render_surface_;
 
   // Set for the layer that other layers are fixed to.
   bool is_container_for_fixed_position_layers_;
   // This property is effective when
   // is_container_for_fixed_position_layers_ == true,
   gfx::Vector2dF fixed_container_size_delta_;
 
   LayerPositionConstraint position_constraint_;
 
@@ skipping 39 matching lines @@
   // Group of properties that need to be computed based on the layer tree
   // hierarchy before layers can be drawn.
   DrawProperties<LayerImpl, RenderSurfaceImpl> draw_properties_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_LAYER_IMPL_H_