[UMA] Track WebSocket usage

third_party/WebKit/Source/modules/websockets/DOMWebSocket.cpp

 /*
  * Copyright (C) 2011 Google Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 259 matching lines @@
     }
 
     if (exceptionState.hadException())
         return nullptr;
 
     return webSocket;
 }
 
 void DOMWebSocket::connect(const String& url, const Vector<String>& protocols, ExceptionState& exceptionState)
 {
+    UseCounter::count(executionContext(), UseCounter::WebSocket);
 
     WTF_LOG(Network, "WebSocket %p connect() url='%s'", this, url.utf8().data());
     m_url = KURL(KURL(), url);
 
     if (executionContext()->securityContext().insecureRequestsPolicy() == SecurityContext::InsecureRequestsUpgrade && m_url.protocol() == "ws") {
         UseCounter::count(executionContext(), UseCounter::UpgradeInsecureRequestsUpgradedRequest);
         m_url.setProtocol("wss");
         if (m_url.port() == 80)
             m_url.setPort(443);
     }
@@ skipping 404 matching lines @@
 DEFINE_TRACE(DOMWebSocket)
 {
     visitor->trace(m_channel);
     visitor->trace(m_eventQueue);
     WebSocketChannelClient::trace(visitor);
     RefCountedGarbageCollectedEventTargetWithInlineData<DOMWebSocket>::trace(visitor);
     ActiveDOMObject::trace(visitor);
 }
 
 } // namespace blink