Track plugin input event latency

ppapi/shared_impl/ppapi_globals.cc

Index: ppapi/shared_impl/ppapi_globals.cc
diff --git a/ppapi/shared_impl/ppapi_globals.cc b/ppapi/shared_impl/ppapi_globals.cc
index 3e985cf226f11965784a3e3a07bd5595d56dd0bf..eef3f5c9004d6a65c0a063f01e13938d3565b498 100644
--- a/ppapi/shared_impl/ppapi_globals.cc
+++ b/ppapi/shared_impl/ppapi_globals.cc
@@ -67,6 +67,17 @@ bool PpapiGlobals::IsPluginGlobals() const { return false; }
 
 void PpapiGlobals::MarkPluginIsActive() {}
 
+void PpapiGlobals::AddLatencyInfo(const ui::LatencyInfo& latency_info,
+                                   PP_Instance instance) {
+  latency_info_for_frame_[instance].push_back(latency_info);
+}
+
+void PpapiGlobals::TransferLatencyInfoTo(
+    std::vector<ui::LatencyInfo>* latency_info, PP_Instance instance) {
+  latency_info->swap(latency_info_for_frame_[instance]);
+  latency_info_for_frame_.erase(instance);
+}
+
 // static
 PpapiGlobals* PpapiGlobals::GetThreadLocalPointer() {
   return tls_ppapi_globals_for_test.Pointer()->Get();