Track plugin input event latency

ppapi/proxy/graphics_2d_resource.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ppapi/proxy/graphics_2d_resource.h"
 
 #include "ppapi/c/pp_bool.h"
 #include "ppapi/c/pp_point.h"
 #include "ppapi/c/pp_rect.h"
 #include "ppapi/c/pp_resource.h"
@@ skipping 104 matching lines @@
 int32_t Graphics2DResource::Flush(scoped_refptr<TrackedCallback> callback) {
   // If host is not even created, return failure immediately.  This can happen
   // when failed to initialize (in constructor).
   if (!sent_create_to_renderer())
     return PP_ERROR_FAILED;
 
   if (TrackedCallback::IsPending(current_flush_callback_))
     return PP_ERROR_INPROGRESS;  // Can't have >1 flush pending.
   current_flush_callback_ = callback;
 
+  std::vector<ui::LatencyInfo> latency_info;
+  PpapiGlobals::Get()->TransferLatencyInfoTo(&latency_info, pp_instance());
+
   Call<PpapiPluginMsg_Graphics2D_FlushAck>(
       RENDERER,
-      PpapiHostMsg_Graphics2D_Flush(),
+      PpapiHostMsg_Graphics2D_Flush(latency_info),
       base::Bind(&Graphics2DResource::OnPluginMsgFlushACK, this));
   return PP_OK_COMPLETIONPENDING;
 }
 
 bool Graphics2DResource::ReadImageData(PP_Resource image,
                                        const PP_Point* top_left) {
   if (!top_left)
     return false;
   int32_t result = SyncCall<PpapiPluginMsg_Graphics2D_ReadImageDataAck>(
       RENDERER,
       PpapiHostMsg_Graphics2D_ReadImageData(image, *top_left));
   return result == PP_OK;
 }
 
 void Graphics2DResource::OnPluginMsgFlushACK(
     const ResourceMessageReplyParams& params) {
   current_flush_callback_->Run(params.result());
 }
 
 }  // namespace proxy
 }  // namespace ppapi