Track plugin input event latency

content/renderer/pepper/pepper_plugin_instance_impl.h

Index: content/renderer/pepper/pepper_plugin_instance_impl.h
diff --git a/content/renderer/pepper/pepper_plugin_instance_impl.h b/content/renderer/pepper/pepper_plugin_instance_impl.h
index ec0a4529120a4d4acc5fb5fb982048b1b7d74860..2dd3c1210ae3b78d38023bc32d7a027a5ba23cd4 100644
--- a/content/renderer/pepper/pepper_plugin_instance_impl.h
+++ b/content/renderer/pepper/pepper_plugin_instance_impl.h
@@ -56,6 +56,7 @@
 #include "third_party/WebKit/public/web/WebPlugin.h"
 #include "third_party/WebKit/public/web/WebUserGestureToken.h"
 #include "ui/base/ime/text_input_type.h"
+#include "ui/events/latency_info.h"
 #include "ui/gfx/rect.h"
 #include "url/gurl.h"
 
@@ -506,6 +507,8 @@ class CONTENT_EXPORT PepperPluginInstanceImpl
   // RenderFrameObserver
   virtual void OnDestruct() OVERRIDE;
 
+  void AddLatencyInfo(const std::vector<ui::LatencyInfo>& latency_info);
+
  private:
   friend class base::RefCounted<PepperPluginInstanceImpl>;
   friend class PpapiUnittest;
@@ -866,6 +869,8 @@ class CONTENT_EXPORT PepperPluginInstanceImpl
   // The text that is currently selected in the plugin.
   base::string16 selected_text_;
 
+  int64 last_input_number_;
+
   // We use a weak ptr factory for scheduling DidChangeView events so that we
   // can tell whether updates are pending and consolidate them. When there's
   // already a weak ptr pending (HasWeakPtrs is true), code should update the