Add option to enable ECDSA key for Java API.

talk/app/webrtc/dtlsidentitystore.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 18 matching lines @@
 
 #include "talk/app/webrtc/webrtcsessiondescriptionfactory.h"
 #include "webrtc/base/logging.h"
 
 using webrtc::DtlsIdentityRequestObserver;
 
 namespace webrtc {
 
 // Passed to SSLIdentity::Generate, "WebRTC". Used for the certificates'
 // subject and issuer name.
-static const char kIdentityName[] = "WebRTC";
+const char kIdentityName[] = "WebRTC";
 
 namespace {
 
 enum {
   MSG_DESTROY,
   MSG_GENERATE_IDENTITY,
   MSG_GENERATE_IDENTITY_RESULT
 };
 
 }  // namespace
@@ skipping 189 matching lines @@
         key_type == rtc::KT_RSA &&             // Only necessary for RSA.
         !request_info_[key_type].free_identity_.get() &&
         request_info_[key_type].request_observers_.size() <=
             request_info_[key_type].gen_in_progress_counts_) {
       GenerateIdentity(key_type, nullptr);
     }
   }
 }
 
 }  // namespace webrtc