Make SyntheticPointerAction to flush the pointer action sequence

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 4711fac648412dfaa494cf9bae36d80d09eef9c0..304fe602bfdd2ffe742e501b8f5cb7dfbeee8b94 100644
--- a/content/browser/renderer_host/render_widget_host_impl.h
+++ b/content/browser/renderer_host/render_widget_host_impl.h
@@ -35,6 +35,7 @@
 #include "content/browser/renderer_host/render_widget_host_view_base.h"
 #include "content/common/input/input_event_ack_state.h"
 #include "content/common/input/synthetic_gesture_packet.h"
+#include "content/common/input/synthetic_pointer_action_params.h"
 #include "content/common/view_message_enums.h"
 #include "content/public/browser/readback_types.h"
 #include "content/public/browser/render_widget_host.h"
@@ -344,6 +345,10 @@ class CONTENT_EXPORT RenderWidgetHostImpl : public RenderWidgetHost,
       std::unique_ptr<SyntheticGesture> synthetic_gesture,
       const base::Callback<void(SyntheticGesture::Result)>& on_complete);
 
+  void QueueSyntheticGesture(
+      const SyntheticGestureParams& gesture_params,
+      const base::Callback<void(SyntheticGesture::Result)>& on_complete);
+
   void CancelUpdateTextDirection();
 
   // Update the composition node of the renderer (or WebKit).