gestures: Generate only either scroll-end or fling-start events at the end of a scroll gesture.

content/browser/renderer_host/render_widget_host_view_win.cc

Index: content/browser/renderer_host/render_widget_host_view_win.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_win.cc b/content/browser/renderer_host/render_widget_host_view_win.cc
index ad12eca7954be0aad25116d21f282bedbe69d165..6009346047eca98b85be7bb0f1bd8bb7744a5275 100644
--- a/content/browser/renderer_host/render_widget_host_view_win.cc
+++ b/content/browser/renderer_host/render_widget_host_view_win.cc
@@ -2880,10 +2880,16 @@ bool RenderWidgetHostViewWin::ForwardGestureEventToRenderer(
     return false;
 
   LocalGestureEvent* local = static_cast<LocalGestureEvent*>(gesture);
-  if (local->data().type == WebKit::WebGestureEvent::Undefined)
+  if (local->data().type == WebKit::WebInputEvent::Undefined)
     return false;
-  const WebKit::WebGestureEvent& generatedEvent = local->data();
-  render_widget_host_->ForwardGestureEvent(generatedEvent);
+  const WebKit::WebGestureEvent& gesture_event = local->data();
+  if (gesture_event.type == WebKit::WebInputEvent::GestureFlingStart) {
+    // WebKit requires that a scroll ends first before a fling starts.

[rjkroege, 2012/08/09 16:51:06]

same comment. :-)

+    WebKit::WebGestureEvent scroll_end = gesture_event;
+    scroll_end.type = WebKit::WebInputEvent::GestureScrollEnd;
+    render_widget_host_->ForwardGestureEvent(scroll_end);
+  }
+  render_widget_host_->ForwardGestureEvent(gesture_event);
   return true;
 }