Use Init dictionaries in RTCPeerConnection legacy methods.

third_party/WebKit/public/platform/WebRTCICECandidate.h

 /*
  * Copyright (C) 2012 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 48 matching lines @@
     bool isNull() const { return m_private.isNull(); }
 
     BLINK_PLATFORM_EXPORT WebString candidate() const;
     BLINK_PLATFORM_EXPORT WebString sdpMid() const;
     BLINK_PLATFORM_EXPORT unsigned short sdpMLineIndex() const;
     BLINK_PLATFORM_EXPORT void setCandidate(WebString);
     BLINK_PLATFORM_EXPORT void setSdpMid(WebString);
     BLINK_PLATFORM_EXPORT void setSdpMLineIndex(unsigned short);
 
 #if INSIDE_BLINK
+    // TODO(guidou): Support setting sdpMLineIndex to -1 to indicate the absence
+    // of a value for sdpMLineIndex. crbug.com/614958
     WebRTCICECandidate(WebString candidate, WebString sdpMid, unsigned short sdpMLineIndex)
     {
         this->initialize(candidate, sdpMid, sdpMLineIndex);
     }
 #endif
 
 private:
     WebPrivatePtr<WebRTCICECandidatePrivate> m_private;
 };
 
 } // namespace blink
 
 #endif // WebRTCICECandidate_h