Don't send touch move to renderer while scrolling

content/browser/renderer_host/touch_event_queue.cc

Index: content/browser/renderer_host/touch_event_queue.cc
diff --git a/content/browser/renderer_host/touch_event_queue.cc b/content/browser/renderer_host/touch_event_queue.cc
index 4ed87331b8435dd008d0625177a0df53aab20fd9..cffd9784e92599f32d0daacd9daf23011313abf2 100644
--- a/content/browser/renderer_host/touch_event_queue.cc
+++ b/content/browser/renderer_host/touch_event_queue.cc
@@ -169,6 +169,13 @@ void TouchEventQueue::PopTouchEventToView(InputEventAckState ack_result) {
   scoped_ptr<CoalescedWebTouchEvent> acked_event(touch_queue_.front());
   touch_queue_.pop_front();
 
+  WebKit::WebInputEvent::Type event_type = acked_event->coalesced_event().type;
+  if (event_type == WebKit::WebInputEvent::TouchCancel &&
+      render_widget_host_->skip_next_acked_touch_cancel()) {
+    render_widget_host_->skip_next_acked_touch_cancel() = false;
+    return;
+  }
+
   // Note that acking the touch-event may result in multiple gestures being sent
   // to the renderer.
   RenderWidgetHostViewPort* view = RenderWidgetHostViewPort::FromRWHV(
@@ -186,6 +193,11 @@ bool TouchEventQueue::ShouldForwardToRenderer(
   if (event.type == WebKit::WebInputEvent::TouchStart)
     return true;
 
+  // If scrolling is in progress, don't sned touch moves to renderer.
+  if (render_widget_host_->scroll_update_in_progress() &&
+      event.type == WebKit::WebInputEvent::TouchMove)
+    return false;
+
   for (unsigned int i = 0; i < event.touchesLength; ++i) {
     const WebKit::WebTouchPoint& point = event.touches[i];
     // If a point has been stationary, then don't take it into account.