Send UMA recording state to TranslateRanker.

chrome/browser/translate/translate_ranker_metrics_provider.h

 // Copyright 2017 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 CHROME_BROWSER_TRANSLATE_TRANSLATE_RANKER_METRICS_PROVIDER_H_
 #define CHROME_BROWSER_TRANSLATE_TRANSLATE_RANKER_METRICS_PROVIDER_H_
 
 #include "components/metrics/metrics_provider.h"
 
 namespace translate {
 
 // Provides metrics related to the translate ranker.
 class TranslateRankerMetricsProvider : public metrics::MetricsProvider {
  public:
   TranslateRankerMetricsProvider() {}
   ~TranslateRankerMetricsProvider() override {}
+  void OnRecordingEnabled() override;

[Roger McFarlane (Chromium), 2017/06/06 19:28:27]

Should these be down next to ProvideGeneralMetrics(...)?

[hamelphi, 2017/06/06 20:28:06]

Actually, I don't think ProvideGeneralMetrics should be private. MetricsProvider
declares it as public. so I moved it up here.

+  void OnRecordingDisabled() override;
 
  private:
   // From metrics::MetricsProvider...
   void ProvideGeneralMetrics(
       metrics::ChromeUserMetricsExtension* uma_proto) override;
 
+  // Enables or disables the logging for translate ranker.
+  void SetLoggingState(bool logging_enabled);
+
   DISALLOW_COPY_AND_ASSIGN(TranslateRankerMetricsProvider);
 };
 
 }  // namespace translate
 
 #endif  // CHROME_BROWSER_TRANSLATE_TRANSLATE_RANKER_METRICS_PROVIDER_H_