RAPPOR metric for usage of RTCPeerConnection without connecting.

third_party/WebKit/Source/core/frame/HostsUsingFeatures.h

 // Copyright 2015 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 HostsUsingFeatures_h
 #define HostsUsingFeatures_h
 
 #include "core/CoreExport.h"
 #include "platform/heap/Handle.h"
 #include "platform/weborigin/KURL.h"
@@ skipping 24 matching lines @@
     FullscreenInsecureHost,
     GeolocationInsecureHost,
     GetUserMediaInsecureHost,
     GetUserMediaSecureHost,
     ElementAttachShadow,
     ApplicationCacheManifestSelectInsecureHost,
     ApplicationCacheAPIInsecureHost,
     RTCPeerConnectionAudio,
     RTCPeerConnectionVideo,
     RTCPeerConnectionDataChannel,
+    RTCPeerConnectionUsed,  // Used to compute the "unconnected PCs" feature
 
     NumberOfFeatures  // This must be the last item.
   };
 
   static void countAnyWorld(Document&, Feature);
   static void countMainWorldOnly(const ScriptState*, Document&, Feature);
   static void countHostOrIsolatedWorldHumanReadableName(const ScriptState*,
                                                         EventTarget&,
                                                         Feature);
 
@@ skipping 32 matching lines @@
   void recordNamesToRappor();
   void recordETLDPlus1ToRappor();
 
   Vector<std::pair<KURL, HostsUsingFeatures::Value>, 1> m_urlAndValues;
   HashMap<String, HostsUsingFeatures::Value> m_valueByName;
 };
 
 }  // namespace blink
 
 #endif  // HostsUsingFeatures_h