UMA: use a more frequent upload interval for Chromecast.

chrome/browser/metrics/chrome_metrics_service_client.h

Index: chrome/browser/metrics/chrome_metrics_service_client.h
diff --git a/chrome/browser/metrics/chrome_metrics_service_client.h b/chrome/browser/metrics/chrome_metrics_service_client.h
index 2b95742b3cf670e477beb56ce1e19e3579884cbb..c2f1c6e8bb2635ac94eec52cdf81e7998415d383 100644
--- a/chrome/browser/metrics/chrome_metrics_service_client.h
+++ b/chrome/browser/metrics/chrome_metrics_service_client.h
@@ -68,6 +68,7 @@ class ChromeMetricsServiceClient
   void CollectFinalMetrics(const base::Closure& done_callback) override;
   scoped_ptr<metrics::MetricsLogUploader> CreateUploader(
       const base::Callback<void(int)>& on_upload_complete) override;
+  base::TimeDelta GetStandardUploadInterval() override;
   base::string16 GetRegistryBackupKey() override;
 
   metrics::MetricsService* metrics_service() { return metrics_service_.get(); }
@@ -171,6 +172,10 @@ class ChromeMetricsServiceClient
   // MemoryDetails.
   MemoryGrowthTracker memory_growth_tracker_;
 
+  // Callback to determine whether or not a cellular network is currently being
+  // used.
+  base::Callback<void(bool*)> cellular_callback_;
+
   base::WeakPtrFactory<ChromeMetricsServiceClient> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeMetricsServiceClient);