Add option to enable ECDSA key for Java API.

talk/app/webrtc/java/jni/classreferenceholder.cc

 /*
  * libjingle
  * Copyright 2015 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 83 matching lines @@
 #endif
   LoadClass(jni, "org/webrtc/MediaSource$State");
   LoadClass(jni, "org/webrtc/MediaStream");
   LoadClass(jni, "org/webrtc/MediaStreamTrack$State");
   LoadClass(jni, "org/webrtc/PeerConnection$BundlePolicy");
   LoadClass(jni, "org/webrtc/PeerConnection$RtcpMuxPolicy");
   LoadClass(jni, "org/webrtc/PeerConnection$IceConnectionState");
   LoadClass(jni, "org/webrtc/PeerConnection$IceGatheringState");
   LoadClass(jni, "org/webrtc/PeerConnection$IceTransportsType");
   LoadClass(jni, "org/webrtc/PeerConnection$TcpCandidatePolicy");
+  LoadClass(jni, "org/webrtc/PeerConnection$KeyType");
   LoadClass(jni, "org/webrtc/PeerConnection$SignalingState");
   LoadClass(jni, "org/webrtc/SessionDescription");
   LoadClass(jni, "org/webrtc/SessionDescription$Type");
   LoadClass(jni, "org/webrtc/StatsReport");
   LoadClass(jni, "org/webrtc/StatsReport$Value");
   LoadClass(jni, "org/webrtc/VideoRenderer$I420Frame");
   LoadClass(jni, "org/webrtc/VideoCapturer");
   LoadClass(jni, "org/webrtc/VideoTrack");
 }
 
@@ skipping 26 matching lines @@
   CHECK(inserted) << "Duplicate class name: " << name;
 }
 
 // Returns a global reference guaranteed to be valid for the lifetime of the
 // process.
 jclass FindClass(JNIEnv* jni, const char* name) {
   return g_class_reference_holder->GetClass(name);
 }
 
 }  // namespace webrtc_jni