Communicate whether passive event listeners exist to cc.

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 265 matching lines @@
     return user_scrollable_horizontal_;
   }
   bool user_scrollable_vertical() const { return user_scrollable_vertical_; }
 
   void AddMainThreadScrollingReasons(uint32_t main_thread_scrolling_reasons);
   void ClearMainThreadScrollingReasons();
   bool should_scroll_on_main_thread() const {
     return !!main_thread_scrolling_reasons_;
   }
 
-  void SetHaveWheelEventHandlers(bool have_wheel_event_handlers);
-  bool have_wheel_event_handlers() const { return have_wheel_event_handlers_; }
+  void SetTouchEventProperties(uint32_t touch_event_properties);
+  uint32_t touch_event_properties() const { return touch_event_properties_; }
+
+  void SetWheelEventProperties(uint32_t wheel_event_properties);
+  uint32_t wheel_event_properties() const { return wheel_event_properties_; }
 
   void SetHaveScrollEventHandlers(bool have_scroll_event_handlers);
   bool have_scroll_event_handlers() const {
     return have_scroll_event_handlers_;
   }
 
   void SetNonFastScrollableRegion(const Region& non_fast_scrollable_region);
   const Region& non_fast_scrollable_region() const {
     return non_fast_scrollable_region_;
   }
@@ skipping 422 matching lines @@
   int num_descendants_that_draw_content_;
   int transform_tree_index_;
   int effect_tree_index_;
   int clip_tree_index_;
   int property_tree_sequence_number_;
   uint64_t element_id_;
   uint32_t mutable_properties_;
   gfx::Vector2dF offset_to_transform_parent_;
   uint32_t main_thread_scrolling_reasons_;
   bool should_flatten_transform_from_property_tree_ : 1;
-  bool have_wheel_event_handlers_ : 1;
   bool have_scroll_event_handlers_ : 1;
   bool user_scrollable_horizontal_ : 1;
   bool user_scrollable_vertical_ : 1;
   bool is_root_for_isolated_group_ : 1;
   bool is_container_for_fixed_position_layers_ : 1;
   bool is_drawable_ : 1;
   bool draws_content_ : 1;
   bool hide_layer_and_subtree_ : 1;
   bool masks_to_bounds_ : 1;
   bool contents_opaque_ : 1;
   bool double_sided_ : 1;
   bool should_flatten_transform_ : 1;
   bool use_parent_backface_visibility_ : 1;
   bool force_render_surface_ : 1;
   bool transform_is_invertible_ : 1;
   bool has_render_surface_ : 1;
   ScrollBlocksOn scroll_blocks_on_ : 3;
+  uint32_t touch_event_properties_;
+  uint32_t wheel_event_properties_;
   Region non_fast_scrollable_region_;
   Region touch_event_handler_region_;
   gfx::PointF position_;
   SkColor background_color_;
   float opacity_;
   SkXfermode::Mode blend_mode_;
   // draw_blend_mode may be different than blend_mode_,
   // when a RenderSurface re-parents the layer's blend_mode.
   SkXfermode::Mode draw_blend_mode_;
   FilterOperations filters_;
@@ skipping 35 matching lines @@
   std::vector<FrameTimingRequest> frame_timing_requests_;
   bool frame_timing_requests_dirty_;
   bool is_hidden_from_property_trees_;
 
   DISALLOW_COPY_AND_ASSIGN(Layer);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_LAYER_H_