Move the thread hop for UMA user actions from content:: to base::.

chromecast/browser/metrics/cast_metrics_service_client.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 CHROMECAST_BROWSER_METRICS_CAST_METRICS_SERVICE_CLIENT_H_
 #define CHROMECAST_BROWSER_METRICS_CAST_METRICS_SERVICE_CLIENT_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 63 matching lines @@
   bool GetBrand(std::string* brand_code) override;
   ::metrics::SystemProfileProto::Channel GetChannel() override;
   std::string GetVersionString() override;
   void OnLogUploadComplete() override;
   void InitializeSystemProfileMetrics(
       const base::Closure& done_callback) override;
   void CollectFinalMetricsForLog(const base::Closure& done_callback) override;
   std::unique_ptr<::metrics::MetricsLogUploader> CreateUploader(
       const base::Callback<void(int)>& on_upload_complete) override;
   base::TimeDelta GetStandardUploadInterval() override;
+  scoped_refptr<base::SingleThreadTaskRunner> GetMainThreadTaskRunner()
+      override;
 
   // Starts/stops the metrics service.
   void EnableMetricsService(bool enabled);
 
   std::string client_id() const { return client_id_; }
 
  private:
   CastMetricsServiceClient(base::TaskRunner* io_task_runner,
                            PrefService* pref_service,
                            net::URLRequestContextGetter* request_context);
@@ skipping 20 matching lines @@
   std::unique_ptr<::metrics::MetricsService> metrics_service_;
   net::URLRequestContextGetter* const request_context_;
 
   DISALLOW_COPY_AND_ASSIGN(CastMetricsServiceClient);
 };
 
 }  // namespace metrics
 }  // namespace chromecast
 
 #endif  // CHROMECAST_BROWSER_METRICS_CAST_METRICS_SERVICE_CLIENT_H_