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 eb69fce58933f696fe3b2e2f7293b19d713581e4..025d004bb6579dc1b98873aaaca417311c4de5d9 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"
@@ -667,6 +668,8 @@ class CONTENT_EXPORT RenderWidgetHostImpl : public RenderWidgetHost,
       int snapshot_id,
       scoped_refptr<base::RefCountedBytes> png_data);
 
+  void SetSyntheticGestureController();
+
   // true if a renderer has once been valid. We use this flag to display a sad
   // tab only when we lose our renderer and not if a paint occurs during
   // initialization.