Introduce ServiceWorker.ActivatedWorkerPreparationForMainFrame.Time UMA.

content/browser/service_worker/service_worker_context_observer.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_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_OBSERVER_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_OBSERVER_H_
 
 #include <stdint.h>
 
 #include "base/strings/string16.h"
 #include "base/time/time.h"
 #include "content/browser/service_worker/service_worker_version.h"
 #include "url/gurl.h"
 
 namespace content {
 
+enum class EmbeddedWorkerStatus;
+
 class ServiceWorkerContextObserver {
  public:
   struct ErrorInfo {
     ErrorInfo(const base::string16& message,
               int line,
               int column,
               const GURL& url)
         : error_message(message),
           line_number(line),
           column_number(column),
@@ skipping 18 matching lines @@
     const int message_level;
     const base::string16 message;
     const int line_number;
     const GURL source_url;
   };
   virtual void OnNewLiveRegistration(int64_t registration_id,
                                      const GURL& pattern) {}
   virtual void OnNewLiveVersion(int64_t version_id,
                                 int64_t registration_id,
                                 const GURL& script_url) {}
-  virtual void OnRunningStateChanged(
-      int64_t version_id,
-      ServiceWorkerVersion::RunningStatus running_status) {}
+  virtual void OnRunningStateChanged(int64_t version_id,
+                                     EmbeddedWorkerStatus running_status) {}
   virtual void OnVersionStateChanged(int64_t version_id,
                                      ServiceWorkerVersion::Status status) {}
   virtual void OnMainScriptHttpResponseInfoSet(
       int64_t version_id,
       base::Time script_response_time,
       base::Time script_last_modified) {}
   virtual void OnErrorReported(int64_t version_id,
                                int process_id,
                                int thread_id,
                                const ErrorInfo& info) {}
@@ skipping 17 matching lines @@
   // data is wiped out.
   virtual void OnStorageWiped() {}
 
  protected:
   virtual ~ServiceWorkerContextObserver() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_OBSERVER_H_