ServiceWorker: Add UMA to measure execution times of oninstall/onfetch

content/renderer/service_worker/service_worker_script_context.h

 // Copyright 2014 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.
 
 #ifndef CONTENT_RENDERER_SERVICE_WORKER_SERVICE_WORKER_SCRIPT_CONTEXT_H_
 #define CONTENT_RENDERER_SERVICE_WORKER_SERVICE_WORKER_SCRIPT_CONTEXT_H_
 
+#include <map>
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/id_map.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string16.h"
+#include "base/time/time.h"
 #include "content/child/webmessageportchannel_impl.h"
 #include "content/common/service_worker/service_worker_types.h"
 #include "content/renderer/service_worker/service_worker_cache_storage_dispatcher.h"
 #include "third_party/WebKit/public/platform/WebMessagePortChannel.h"
 #include "third_party/WebKit/public/platform/WebServiceWorkerClientsInfo.h"
 #include "third_party/WebKit/public/platform/WebServiceWorkerEventResult.h"
 
 namespace blink {
 class WebServiceWorkerContextProxy;
 }
@@ skipping 70 matching lines @@
   blink::WebServiceWorkerContextProxy* proxy_;
 
   // Used for incoming messages from the browser for which an outgoing response
   // back to the browser is expected, the id must be sent back with the
   // response.
   int current_request_id_;
 
   // Pending callbacks for GetClientDocuments().
   ClientsCallbacksMap pending_clients_callbacks_;
 
+  // Capture timestamps for UMA
+  std::map<int, base::TimeTicks> activate_start_timings_;
+  std::map<int, base::TimeTicks> fetch_start_timings_;
+  std::map<int, base::TimeTicks> install_start_timings_;
+
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerScriptContext);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_SERVICE_WORKER_SERVICE_WORKER_SCRIPT_CONTEXT_H_