Plumb firing passive event listeners.

ui/events/blink/input_handler_proxy.h

Index: ui/events/blink/input_handler_proxy.h
diff --git a/ui/events/blink/input_handler_proxy.h b/ui/events/blink/input_handler_proxy.h
index e96b31bf40b918d39423a66de100a173a98a902a..a8d789c3f2d01d326003e90e2b1525ab2047f88e 100644
--- a/ui/events/blink/input_handler_proxy.h
+++ b/ui/events/blink/input_handler_proxy.h
@@ -46,10 +46,14 @@ class InputHandlerProxy
   }
 
   void set_smooth_scroll_enabled(bool value) { smooth_scroll_enabled_ = value; }
+  void set_use_gesture_events_for_mouse_wheel(bool value) {
+    use_gesture_events_for_mouse_wheel_ = value;
+  }
 
   enum EventDisposition {
     DID_HANDLE,
     DID_NOT_HANDLE,
+    NON_BLOCKING,
     DROP_EVENT
   };
   EventDisposition HandleInputEventWithLatencyInfo(
@@ -91,6 +95,7 @@ class InputHandlerProxy
   // Helper functions for handling more complicated input events.
   EventDisposition HandleMouseWheel(
       const blink::WebMouseWheelEvent& event);
+  EventDisposition ScrollByMouseWheel(const blink::WebMouseWheelEvent& event);
   EventDisposition HandleGestureScrollBegin(
       const blink::WebGestureEvent& event);
   EventDisposition HandleGestureScrollUpdate(
@@ -99,8 +104,9 @@ class InputHandlerProxy
       const blink::WebGestureEvent& event);
   EventDisposition HandleGestureFlingStart(
       const blink::WebGestureEvent& event);
-  EventDisposition HandleTouchStart(
-      const blink::WebTouchEvent& event);
+  EventDisposition HandleTouchStart(const blink::WebTouchEvent& event);
+  EventDisposition HandleTouchMove(const blink::WebTouchEvent& event);
+  EventDisposition HandleTouchEnd(const blink::WebTouchEvent& event);
 
   // Returns true if the event should be suppressed due to to an active,
   // boost-enabled fling, in which case further processing should cease.
@@ -184,8 +190,15 @@ class InputHandlerProxy
   scoped_ptr<InputScrollElasticityController> scroll_elasticity_controller_;
 
   bool smooth_scroll_enabled_;
-
   bool uma_latency_reporting_enabled_;
+  bool use_gesture_events_for_mouse_wheel_;
+
+  // The effective result of the last touch start whether the sequence should
+  // be blocked or not. The value will be combined with previous touch starts
+  // results if more than one point occurs. This value will
+  // get returned for subsequent TouchMove events to allow passive
+  // events not to block scrolling.

[tdresser, 2016/02/10 19:37:17]

// The effective result of the last touch start [missing something here?]
whether the sequence should
// be blocked or not. The value will be combined with previous touch starts
[touch start results?]
// results if more than one point [point->touchstart] occurs. This value will
// get returned for subsequent TouchMove events to allow passive
// events not to block scrolling.

[dtapuska, 2016/02/10 22:05:22]

Done.

+  int32_t touch_start_result_;
 
   base::TimeTicks last_fling_animate_time_;