Track plugin input event latency

ppapi/proxy/plugin_globals.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/plugin_globals.h"
 
 #include "base/task_runner.h"
 #include "base/threading/thread.h"
 #include "ipc/ipc_message.h"
 #include "ipc/ipc_sender.h"
@@ skipping 216 matching lines @@
 
 bool PluginGlobals::IsPluginGlobals() const {
   return true;
 }
 
 void PluginGlobals::OnReleaseKeepaliveThrottle() {
   ppapi::ProxyLock::AssertAcquiredDebugOnly();
   plugin_recently_active_ = false;
 }
 
+void PluginGlobals::AddLatencyInfo(ui::LatencyInfo latency_info,
+                                   PP_Instance instance) {
+  static int64 seq_num = 0;
+  latency_info.AddLatencyNumber(
+      ui::INPUT_EVENT_LATENCY_BEGIN_PLUGIN_COMPONENT, 0, seq_num++);
+  pending_latency_info_[instance].push_back(latency_info);
+}
+
+void PluginGlobals::OnGraphicsInvalidation(PP_Instance instance) {
+  if (pending_latency_info_.find(instance) != pending_latency_info_.end()) {
+    const std::vector<ui::LatencyInfo>& latency
+        = pending_latency_info_[instance];
+    for (size_t i = 0; i < latency.size(); i++)
+      latency_info_for_frame_[instance].push_back(latency[i]);
+    pending_latency_info_.erase(instance);
+  }
+}
+
+void PluginGlobals::OnGraphicsFlush(std::vector<ui::LatencyInfo>* latency_info,
+                                    PP_Instance instance) {
+  latency_info->swap(latency_info_for_frame_[instance]);
+  if (pending_latency_info_.find(instance) != pending_latency_info_.end()) {
+    std::vector<ui::LatencyInfo>& latency = pending_latency_info_[instance];
+    for (size_t i = 0; i < latency.size(); i++) {
+      latency[i].AddLatencyNumber(
+          ui::INPUT_EVENT_LATENCY_TERMINATED_PLUGIN_COMPONENT, 0, 0);
+    }
+    pending_latency_info_.erase(instance);
+  }
+}
+
 }  // namespace proxy
 }  // namespace ppapi