Communicate whether passive event listeners exist to cc.

cc/layers/layer.h

Index: cc/layers/layer.h
diff --git a/cc/layers/layer.h b/cc/layers/layer.h
index 94f827139fe9205e7a3df7468287e7b84224e65b..1ebcde8583be3f3b4bc427a63d991d9196400513 100644
--- a/cc/layers/layer.h
+++ b/cc/layers/layer.h
@@ -283,8 +283,11 @@ class CC_EXPORT Layer : public base::RefCounted<Layer>,
     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 {
@@ -727,7 +730,6 @@ class CC_EXPORT Layer : public base::RefCounted<Layer>,
   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;
@@ -745,6 +747,8 @@ class CC_EXPORT Layer : public base::RefCounted<Layer>,
   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_;