Prepare SyntheticPointerAction to handle touch actions for multiple fingers

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 58829e892ed0045516424e93033314fa00d8bd2c..afa1f1b87684b718676f2eb85f5ad480d01d0872 100644
--- a/content/browser/renderer_host/render_widget_host_impl.h
+++ b/content/browser/renderer_host/render_widget_host_impl.h
@@ -34,6 +34,7 @@
 #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"
@@ -323,6 +324,10 @@ class CONTENT_EXPORT RenderWidgetHostImpl : public RenderWidgetHost,
       std::unique_ptr<SyntheticGesture> synthetic_gesture,
       const base::Callback<void(SyntheticGesture::Result)>& on_complete);
 
+  void QueueSyntheticPointerAction(
+      const SyntheticPointerActionParams& gesture_params,
+      const base::Callback<void(SyntheticGesture::Result)>& on_complete);
+
   void CancelUpdateTextDirection();
 
   // Update the composition node of the renderer (or WebKit).
@@ -624,6 +629,8 @@ class CONTENT_EXPORT RenderWidgetHostImpl : public RenderWidgetHost,
 
   void OnSyntheticGestureCompleted(SyntheticGesture::Result result);
 
+  void OnSyntheticPointerActionCompleted(SyntheticGesture::Result result);
+
   // Called when there is a new auto resize (using a post to avoid a stack
   // which may get in recursive loops).
   void DelayedAutoResized();