Track plugin input event latency

content/renderer/gpu/render_widget_compositor.h

Index: content/renderer/gpu/render_widget_compositor.h
diff --git a/content/renderer/gpu/render_widget_compositor.h b/content/renderer/gpu/render_widget_compositor.h
index a97a36af4cae09f2ed4dd43f624808490608499f..208108c2ff299f4d51aee86ec6c8dd50f198c89c 100644
--- a/content/renderer/gpu/render_widget_compositor.h
+++ b/content/renderer/gpu/render_widget_compositor.h
@@ -9,6 +9,7 @@
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
 #include "base/values.h"
+#include "cc/base/swap_promise.h"
 #include "cc/base/swap_promise_monitor.h"
 #include "cc/input/top_controls_state.h"
 #include "cc/trees/layer_tree_host_client.h"
@@ -63,6 +64,9 @@ class RenderWidgetCompositor : public blink::WebLayerTreeView,
   // into a LatencyInfoSwapPromise.
   scoped_ptr<cc::SwapPromiseMonitor> CreateLatencyInfoSwapPromiseMonitor(
       ui::LatencyInfo* latency);
+  // Calling QueueSwapPromise() to directly queue a SwapPromise into
+  // LayerTreeHost.
+  void QueueSwapPromise(scoped_ptr<cc::SwapPromise> swap_promise);
   int GetLayerTreeId() const;
   void NotifyInputThrottledUntilCommit();
   const cc::Layer* GetRootLayer() const;