Introduce ServiceWorker.ActivatedWorkerPreparationForMainFrame.Time UMA.

content/browser/service_worker/service_worker_browsertest.cc

 // 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.
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <map>
 #include <memory>
 #include <utility>
@@ skipping 961 matching lines @@
   WaitForLoaded wait_for_load(load_run_loop.QuitClosure());
   version_->embedded_worker()->AddListener(&wait_for_load);
   BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
                           base::Bind(&self::StartOnIOThread, this,
                                      start_run_loop.QuitClosure(), &status));
   load_run_loop.Run();
   version_->embedded_worker()->RemoveListener(&wait_for_load);
 
   // The script has loaded but start has not completed yet.
   ASSERT_EQ(SERVICE_WORKER_ERROR_FAILED, status);
-  EXPECT_EQ(ServiceWorkerVersion::STARTING, version_->running_status());
+  EXPECT_EQ(ServiceWorkerVersion::RunningStatus::STARTING,
+            version_->running_status());
 
   // Simulate execution timeout. Use a delay to prevent killing the worker
   // before it's started execution.
   EXPECT_TRUE(version_->timeout_timer_.IsRunning());
   RunOnIOThreadWithDelay(base::Bind(&self::TimeoutWorkerOnIOThread, this),
                          base::TimeDelta::FromMilliseconds(100));
   start_run_loop.Run();
 
   EXPECT_EQ(SERVICE_WORKER_ERROR_TIMEOUT, status);
 }
@@ skipping 872 matching lines @@
   NavigateToTestPage();
   // The V8 code cache must be stored to the CacheStorage which must be bigger
   // than 12 byte.
   EXPECT_GT(GetSideDataSize(), kV8CacheTimeStampDataSize);
 
   NavigateToTestPage();
   EXPECT_GT(GetSideDataSize(), kV8CacheTimeStampDataSize);
 }
 
 }  // namespace content