Removes the old createDataChannel and starts to use the new one with WebRTCDataChannelInit

public/platform/WebRTCDataChannelInit.h

 /*
  * 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 10 matching lines @@
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * 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.
  */
 
-#ifndef WebInbandTextTrackClient_h
-#define WebInbandTextTrackClient_h
+#ifndef WebRTCDataChannelInit_h
+#define WebRTCDataChannelInit_h
+
+#include "WebString.h"
 
 namespace WebKit {
 
-class WebString;
+struct WebRTCDataChannelInit {
+public:
+    WebRTCDataChannelInit()
+        : id(-1)
+        , ordered(true)
+        , negotiated(true)
+        , maxRetransmitTime(-1)
+        , maxRetransmits(-1) { }
 
-class WebInbandTextTrackClient {
-public:
-    virtual ~WebInbandTextTrackClient() {}
-
-    virtual void addWebVTTCue(double start,
-                              double end,
-                              const WebString& id,
-                              const WebString& content,
-                              const WebString& settings) = 0;
+    int id;
+    bool ordered;
+    bool negotiated;
+    int maxRetransmitTime;
+    int maxRetransmits;

[Ami GONE FROM CHROMIUM, 2013/06/05 20:18:28]

IWBN for this to match the order in talk/app/webrtc/datachannelinterface.h
(there, maxRetransmits comes before maxRetransmitTime)

It seems natural to me to order both according to the WebIDL but maybe I'm
missing something:
http://dev.w3.org/2011/webrtc/editor/webrtc.html#idl-def-RTCDataChannelInit

+    WebString protocol;
 };
 
 } // namespace WebKit
 
-#endif
+#endif // WebRTCDataChannelInit_h