Plumb firing passive event listeners.

ui/events/blink/input_handler_proxy.h

 // Copyright 2013 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 UI_EVENTS_BLINK_INPUT_HANDLER_PROXY_H_
 #define UI_EVENTS_BLINK_INPUT_HANDLER_PROXY_H_
 
 #include "base/containers/hash_tables.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 28 matching lines @@
 
   InputHandlerProxy(cc::InputHandler* input_handler,
                     InputHandlerProxyClient* client);
   ~InputHandlerProxy() override;
 
   InputScrollElasticityController* scroll_elasticity_controller() {
     return scroll_elasticity_controller_.get();
   }
 
   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,
+    DID_HANDLE_NON_BLOCKING,
     DROP_EVENT
   };
   EventDisposition HandleInputEventWithLatencyInfo(
       const blink::WebInputEvent& event,
       ui::LatencyInfo* latency_info);
   EventDisposition HandleInputEvent(const blink::WebInputEvent& event);
 
   // cc::InputHandlerClient implementation.
   void WillShutdown() override;
   void Animate(base::TimeTicks time) override;
@@ skipping 21 matching lines @@
   bool gesture_scroll_on_impl_thread_for_testing() const {
     return gesture_scroll_on_impl_thread_;
   }
 
  private:
   friend class test::InputHandlerProxyTest;
 
   // 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(
       const blink::WebGestureEvent& event);
   EventDisposition HandleGestureScrollEnd(
       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.
   bool FilterInputEventForFlingBoosting(const blink::WebInputEvent& event);
 
   // Schedule a time in the future after which a boost-enabled fling will
   // terminate without further momentum from the user (see |Animate()|).
   void ExtendBoostedFlingTimeout(const blink::WebGestureEvent& event);
 
   // Returns true if we scrolled by the increment.
@@ skipping 63 matching lines @@
   // determining if the fling start time should be re-initialized.
   bool has_fling_animation_started_;
 
   // Non-zero only within the scope of |scrollBy|.
   gfx::Vector2dF current_fling_velocity_;
 
   // Used to animate rubber-band over-scroll effect on Mac.
   scoped_ptr<InputScrollElasticityController> scroll_elasticity_controller_;
 
   bool smooth_scroll_enabled_;
+  bool uma_latency_reporting_enabled_;
+  bool use_gesture_events_for_mouse_wheel_;
 
-  bool uma_latency_reporting_enabled_;
+  // The merged result of the last touch start with previous touch starts.
+  // This value will get returned for subsequent TouchMove events to allow
+  // passive events not to block scrolling.
+  int32_t touch_start_result_;
 
   base::TimeTicks last_fling_animate_time_;
 
   DISALLOW_COPY_AND_ASSIGN(InputHandlerProxy);
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_BLINK_INPUT_HANDLER_PROXY_H_