Add UMA for how long service workers run for.

content/browser/service_worker/embedded_worker_instance_unittest.cc

 // Copyright 2013 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 "content/browser/service_worker/embedded_worker_instance.h"
 
 #include <stdint.h>
 #include <utility>
 #include <vector>
 
@@ skipping 301 matching lines @@
   EXPECT_EQ(EmbeddedWorkerStatus::RUNNING, worker->status());
   EXPECT_EQ(helper_->mock_render_process_id(), worker->process_id());
   worker->StopIfIdle();
   EXPECT_EQ(EmbeddedWorkerStatus::STOPPING, worker->status());
   base::RunLoop().RunUntilIdle();
 
   // The worker must be stopped now.
   EXPECT_EQ(EmbeddedWorkerStatus::STOPPED, worker->status());
 
   // Set devtools_attached to true, and do the same.
-  worker->set_devtools_attached(true);
+  worker->SetDevToolsAttached(true);
 
   EXPECT_EQ(SERVICE_WORKER_OK,
             StartWorker(worker.get(), service_worker_version_id, pattern, url));
   EXPECT_EQ(EmbeddedWorkerStatus::RUNNING, worker->status());
   EXPECT_EQ(helper_->mock_render_process_id(), worker->process_id());
   worker->StopIfIdle();
   base::RunLoop().RunUntilIdle();
 
   // The worker must not be stopped this time.
   EXPECT_EQ(EmbeddedWorkerStatus::RUNNING, worker->status());
@@ skipping 478 matching lines @@
   ASSERT_EQ(1UL, instance_client_rawptr->message().size());
   EXPECT_EQ(test_message, instance_client_rawptr->message()[0]);
 
   // Ensure the worker is stopped.
   worker->Stop();
   base::RunLoop().RunUntilIdle();
   EXPECT_EQ(EmbeddedWorkerStatus::STOPPED, worker->status());
 }
 
 }  // namespace content