Change WebRTC SslCipher to be exposed as number only.

talk/app/webrtc/fakemetricsobserver.h

Index: talk/app/webrtc/fakemetricsobserver.h
diff --git a/talk/app/webrtc/fakemetricsobserver.h b/talk/app/webrtc/fakemetricsobserver.h
index 39454bf4db48862a32b0b7d7b64ed6a1bc184502..75764a387b1abb80a77b6d6962d3ba45b00d8a5e 100644
--- a/talk/app/webrtc/fakemetricsobserver.h
+++ b/talk/app/webrtc/fakemetricsobserver.h
@@ -46,25 +46,21 @@ class FakeMetricsObserver : public MetricsObserverInterface {
                             int counter_max) override;
   void AddHistogramSample(PeerConnectionMetricsName type,
                           int value) override;
-  void AddHistogramSample(PeerConnectionMetricsName type,
-                          const std::string& value) override;
 
   // Accessors to be used by the tests.
   int GetEnumCounter(PeerConnectionEnumCounterType type, int counter) const;
-  int GetIntHistogramSample(PeerConnectionMetricsName type) const;
-  const std::string& GetStringHistogramSample(
-      PeerConnectionMetricsName type) const;
+  int GetHistogramSample(PeerConnectionMetricsName type) const;
 
  protected:
   ~FakeMetricsObserver() {}
 
  private:
   rtc::ThreadChecker thread_checker_;
-  // This is a 2 dimension array. The first index is the enum counter type. The
-  // 2nd index is the counter of that particular enum counter type.
-  std::vector<std::vector<int>> counters_;
-  int int_histogram_samples_[kPeerConnectionMetricsName_Max];
-  std::string string_histogram_samples_[kPeerConnectionMetricsName_Max];
+  // The outer array is the type of the enum counter. The inner map is mapping
+  // from a particular counter to its accumulated count. The reason it is a map
+  // is to work with sparse enum type which might span a large number space.

[juberti, 2015/09/24 21:37:32]

An example of how this works would also be helpful. Is there any limit to the
size of the array?

[guoweis_webrtc, 2015/09/25 18:30:31]

Done.

+  std::vector<std::map<int, int>> counters_;
+  int histogram_samples_[kPeerConnectionMetricsName_Max];
 };
 
 }  // namespace webrtc