Start collecting two new WebSocket histograms.

Source/modules/websockets/WebSocketPerMessageDeflate.cpp

 /*
  * Copyright (C) 2013 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 14 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 
 #include "modules/websockets/WebSocketPerMessageDeflate.h"
 
+#include "core/platform/HistogramSupport.h"
 #include "modules/websockets/WebSocketExtensionParser.h"
 #include "wtf/HashMap.h"
 #include "wtf/text/CString.h"
 #include "wtf/text/StringHash.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
 class CompressionMessageExtensionProcessor : public WebSocketExtensionProcessor {
     WTF_MAKE_FAST_ALLOCATED;
@@ skipping 64 matching lines @@
             m_failureReason = "Received invalid c2s_max_window_bits parameter";
             return false;
         }
         ++numProcessedParameters;
     }
 
     if (numProcessedParameters != parameters.size()) {
         m_failureReason = "Received an unexpected permessage-deflate extension parameter";
         return false;
     }
+    HistogramSupport::histogramEnumeration("WebCore.WebSocket.PerMessageDeflateContextTakeOverMode", mode, WebSocketDeflater::ContextTakeOverModeMax);
     m_compress.enable(windowBits, mode);
     return true;
 }
 
 WebSocketPerMessageDeflate::WebSocketPerMessageDeflate()
     : m_enabled(false)
     , m_deflateOngoing(false)
     , m_inflateOngoing(false)
 {
 }
@@ skipping 97 matching lines @@
         m_inflater->reset();
 }
 
 void WebSocketPerMessageDeflate::didFail()
 {
     resetDeflateBuffer();
     resetInflateBuffer();
 }
 
 } // namespace WebCore