Don't send touch move to renderer while scrolling

content/browser/renderer_host/render_widget_host_impl.h

Index: content/browser/renderer_host/render_widget_host_impl.h
diff --git a/content/browser/renderer_host/render_widget_host_impl.h b/content/browser/renderer_host/render_widget_host_impl.h
index b79eea67dd779e9641380b20c820218ef6f0c66d..48d93e631f4be35d3c58c2dea7e661697c0baea1 100644
--- a/content/browser/renderer_host/render_widget_host_impl.h
+++ b/content/browser/renderer_host/render_widget_host_impl.h
@@ -344,6 +344,10 @@ class CONTENT_EXPORT RenderWidgetHostImpl : virtual public RenderWidgetHost,
 
   bool has_touch_handler() const { return has_touch_handler_; }
 
+  bool is_scroll_update_in_progress() const {
+    return scroll_update_in_progress_;
+  }
+
   // Notification that the user has made some kind of input that could
   // perform an action. See OnUserGesture for more details.
   void StartUserGesture();
@@ -913,6 +917,8 @@ class CONTENT_EXPORT RenderWidgetHostImpl : virtual public RenderWidgetHost,
   bool pending_mouse_lock_request_;
   bool allow_privileged_mouse_lock_;
 
+  bool scroll_update_in_progress_;
+
   // Keeps track of whether the webpage has any touch event handler. If it does,
   // then touch events are sent to the renderer. Otherwise, the touch events are
   // not sent to the renderer.