Fixing memory leak of generated session descriptions on Android.

webrtc/sdk/android/src/jni/peerconnection_jni.cc

Index: webrtc/sdk/android/src/jni/peerconnection_jni.cc
diff --git a/webrtc/sdk/android/src/jni/peerconnection_jni.cc b/webrtc/sdk/android/src/jni/peerconnection_jni.cc
index c07d58faffc6210116057b02cf9d52f3a9432ea8..708e65db46d400fdd9dc32cd8fc2b9bb0659576c 100644
--- a/webrtc/sdk/android/src/jni/peerconnection_jni.cc
+++ b/webrtc/sdk/android/src/jni/peerconnection_jni.cc
@@ -658,6 +658,9 @@ class SdpObserverWrapper : public T {
     jobject j_sdp = JavaSdpFromNativeSdp(jni(), desc);
     jni()->CallVoidMethod(*j_observer_global_, m, j_sdp);
     CHECK_EXCEPTION(jni()) << "error during CallVoidMethod";
+    // OnSuccess transfers ownership of the description (there's a TODO to make
+    // it use unique_ptr...).
+    delete desc;
   }
 
  protected: