Implement UMA log throttling for cellular connections

components/metrics/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 COMPONENTS_METRICS_METRICS_SERVICE_CLIENT_H_
 #define COMPONENTS_METRICS_METRICS_SERVICE_CLIENT_H_
 
 #include <stdint.h>
 #include <string>
 
@@ skipping 99 matching lines @@
   // //content and thus do not have //content's notification system available
   // as a mechanism for observing renderer crashes).
   virtual void OnRendererProcessCrash() {}
 
   // Returns whether metrics reporting is managed by policy.
   virtual bool IsReportingPolicyManaged();
 
   // Gets information about the default value for the enable metrics reporting
   // checkbox shown during first-run.
   virtual EnableMetricsDefault GetDefaultOptIn();
+
+  // Returns whether cellular logic is enabled for metrics reporting.
+  virtual bool IsUMACellularUploadLogicEnabled();
 };
 
 }  // namespace metrics
 
 #endif  // COMPONENTS_METRICS_METRICS_SERVICE_CLIENT_H_