Compute if a layer is clipped outside CalcDrawProps

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 <map>
 #include <set>
 #include <string>
@@ skipping 165 matching lines @@
   }
 
   void set_should_flatten_transform_from_property_tree(bool should_flatten) {
     should_flatten_transform_from_property_tree_ = should_flatten;
     SetNeedsPushProperties();
   }
   bool should_flatten_transform_from_property_tree() const {
     return should_flatten_transform_from_property_tree_;
   }
 
+  void set_is_clipped_from_property_tree(bool is_clipped) {
+    is_clipped_from_property_tree_ = is_clipped;
+    SetNeedsPushProperties();
+  }
+  bool is_clipped_from_property_tree() const {
+    return is_clipped_from_property_tree_;
+  }
+
   void UpdatePropertyTreeTransform();
   void UpdatePropertyTreeOpacity();
   void UpdatePropertyTreeScrollOffset();
 
   // For compatibility with Layer.
   bool has_render_surface() const { return !!render_surface(); }
 
   void SetNumDescendantsThatDrawContent(int num_descendants);
   void SetClipParent(LayerImpl* ancestor);
 
@@ skipping 561 matching lines @@
   static_assert(SCROLL_BLOCKS_ON_MAX < (1 << 3), "ScrollBlocksOn too big");
   ScrollBlocksOn scroll_blocks_on_ : 3;
 
   bool user_scrollable_horizontal_ : 1;
   bool user_scrollable_vertical_ : 1;
   bool stacking_order_changed_ : 1;
   // Whether the "back" of this layer should draw.
   bool double_sided_ : 1;
   bool should_flatten_transform_ : 1;
   bool should_flatten_transform_from_property_tree_ : 1;
+  bool is_clipped_from_property_tree_ : 1;
 
   // Tracks if drawing-related properties have changed since last redraw.
   bool layer_property_changed_ : 1;
 
   bool masks_to_bounds_ : 1;
   bool contents_opaque_ : 1;
   bool is_root_for_isolated_group_ : 1;
   bool use_parent_backface_visibility_ : 1;
   bool draw_checkerboard_for_missing_tiles_ : 1;
   bool draws_content_ : 1;
@@ skipping 84 matching lines @@
   bool visited_;
   bool layer_or_descendant_is_drawn_;
   bool sorted_for_recursion_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_LAYER_IMPL_H_