Decouple FileSystem and WebSQL callbacks from VoidCallback and it non-refcounted

Source/modules/mediastream/RTCPeerConnection.cpp

Index: Source/modules/mediastream/RTCPeerConnection.cpp
diff --git a/Source/modules/mediastream/RTCPeerConnection.cpp b/Source/modules/mediastream/RTCPeerConnection.cpp
index 9fe2640f61aa9dbe163ca7cbd14867ddcc26c964..da39fa952f83cbf1f9dc90b562d3676b29772655 100644
--- a/Source/modules/mediastream/RTCPeerConnection.cpp
+++ b/Source/modules/mediastream/RTCPeerConnection.cpp
@@ -206,7 +206,7 @@ void RTCPeerConnection::createAnswer(PassOwnPtr<RTCSessionDescriptionCallback> s
     m_peerHandler->createAnswer(request.release(), constraints.release());
 }
 
-void RTCPeerConnection::setLocalDescription(PassRefPtr<RTCSessionDescription> prpSessionDescription, PassRefPtr<VoidCallback> successCallback, PassOwnPtr<RTCErrorCallback> errorCallback, ExceptionState& exceptionState)
+void RTCPeerConnection::setLocalDescription(PassRefPtr<RTCSessionDescription> prpSessionDescription, PassOwnPtr<VoidCallback> successCallback, PassOwnPtr<RTCErrorCallback> errorCallback, ExceptionState& exceptionState)
 {
     if (m_signalingState == SignalingStateClosed) {
         exceptionState.throwUninformativeAndGenericDOMException(InvalidStateError);
@@ -233,7 +233,7 @@ PassRefPtr<RTCSessionDescription> RTCPeerConnection::localDescription(ExceptionS
     return sessionDescription.release();
 }
 
-void RTCPeerConnection::setRemoteDescription(PassRefPtr<RTCSessionDescription> prpSessionDescription, PassRefPtr<VoidCallback> successCallback, PassOwnPtr<RTCErrorCallback> errorCallback, ExceptionState& exceptionState)
+void RTCPeerConnection::setRemoteDescription(PassRefPtr<RTCSessionDescription> prpSessionDescription, PassOwnPtr<VoidCallback> successCallback, PassOwnPtr<RTCErrorCallback> errorCallback, ExceptionState& exceptionState)
 {
     if (m_signalingState == SignalingStateClosed) {
         exceptionState.throwUninformativeAndGenericDOMException(InvalidStateError);
@@ -297,7 +297,7 @@ void RTCPeerConnection::addIceCandidate(RTCIceCandidate* iceCandidate, Exception
         exceptionState.throwUninformativeAndGenericDOMException(SyntaxError);
 }
 
-void RTCPeerConnection::addIceCandidate(RTCIceCandidate* iceCandidate, PassRefPtr<VoidCallback> successCallback, PassOwnPtr<RTCErrorCallback> errorCallback, ExceptionState& exceptionState)
+void RTCPeerConnection::addIceCandidate(RTCIceCandidate* iceCandidate, PassOwnPtr<VoidCallback> successCallback, PassOwnPtr<RTCErrorCallback> errorCallback, ExceptionState& exceptionState)
 {
     if (m_signalingState == SignalingStateClosed) {
         exceptionState.throwUninformativeAndGenericDOMException(InvalidStateError);