Keep track of coalesced events in main thread event queue

third_party/WebKit/Source/web/WebViewImpl.cpp

 /*
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 943 matching lines @@
   //  - magnitude roughly matches wheels: f(2) > 25 && f(2) < 100
   //  - a formula that's relatively easy to use from JavaScript
   // Note that 'wheel' event deltaY values have their sign inverted.  So to
   // convert a wheel deltaY back to a scale use Math.exp(-deltaY/100).
   DCHECK_GT(pinchEvent.data.pinchUpdate.scale, 0);
   wheelEvent.deltaY = 100.0f * log(pinchEvent.data.pinchUpdate.scale);
   wheelEvent.hasPreciseScrollingDeltas = true;
   wheelEvent.wheelTicksX = 0;
   wheelEvent.wheelTicksY = pinchEvent.data.pinchUpdate.scale > 1 ? 1 : -1;
 
-  return handleInputEvent(wheelEvent);
+  return handleInputEvent(blink::WebCoalescedInputEvent(wheelEvent));
 }
 
 void WebViewImpl::transferActiveWheelFlingAnimation(
     const WebActiveWheelFlingParameters& parameters) {
   TRACE_EVENT0("blink", "WebViewImpl::transferActiveWheelFlingAnimation");
   DCHECK(!m_gestureAnimation);
   m_positionOnFlingStart = parameters.point;
   m_globalPositionOnFlingStart = parameters.globalPoint;
   m_flingModifier = parameters.modifiers;
   std::unique_ptr<WebGestureCurve> curve =
@@ skipping 1122 matching lines @@
 bool WebViewImpl::hasVerticalScrollbar() {
   return mainFrameImpl()
       ->frameView()
       ->layoutViewportScrollableArea()
       ->verticalScrollbar();
 }
 
 const WebInputEvent* WebViewImpl::m_currentInputEvent = nullptr;
 
 WebInputEventResult WebViewImpl::handleInputEvent(
-    const WebInputEvent& inputEvent) {
+    const WebCoalescedInputEvent& coalescedEvent) {
+  const WebInputEvent& inputEvent = coalescedEvent.event();
   // TODO(dcheng): The fact that this is getting called when there is no local
   // main frame is problematic and probably indicates a bug in the input event
   // routing code.
   if (!mainFrameImpl())
     return WebInputEventResult::NotHandled;
 
   WebAutofillClient* autofillClient = mainFrameImpl()->autofillClient();
   UserGestureNotifier notifier(this);
   // On the first input event since page load, |notifier| instructs the
   // autofill client to unblock values of password input fields of any forms
@@ skipping 83 matching lines @@
     node->dispatchMouseEvent(
         PlatformMouseEventBuilder(
             mainFrameImpl()->frameView(),
             static_cast<const WebMouseEvent&>(inputEvent)),
         eventType, static_cast<const WebMouseEvent&>(inputEvent).clickCount);
     return WebInputEventResult::HandledSystem;
   }
 
   // FIXME: This should take in the intended frame, not the local frame root.
   WebInputEventResult result = PageWidgetDelegate::handleInputEvent(
-      *this, WebCoalescedInputEvent(inputEvent), mainFrameImpl()->frame());
+      *this, coalescedEvent, mainFrameImpl()->frame());
   if (result != WebInputEventResult::NotHandled)
     return result;
 
   // Unhandled pinch events should adjust the scale.
   if (inputEvent.type() == WebInputEvent::GesturePinchUpdate) {
     const WebGestureEvent& pinchEvent =
         static_cast<const WebGestureEvent&>(inputEvent);
 
     // For touchpad gestures synthesize a Windows-like wheel event
     // to send to any handlers that may exist. Not necessary for touchscreen
@@ skipping 1964 matching lines @@
   if (focusedFrame->localFrameRoot() != mainFrameImpl()->frame())
     return nullptr;
   return focusedFrame;
 }
 
 LocalFrame* WebViewImpl::focusedLocalFrameAvailableForIme() const {
   return m_imeAcceptEvents ? focusedLocalFrameInWidget() : nullptr;
 }
 
 }  // namespace blink