Split ByteBuffer into writer/reader objects.

webrtc/p2p/base/stunrequest.cc

Index: webrtc/p2p/base/stunrequest.cc
diff --git a/webrtc/p2p/base/stunrequest.cc b/webrtc/p2p/base/stunrequest.cc
index 9ceb6dabb747d7da3f49635471ac63b7d14fa4a4..546dd157d9949f5128f44a17d08f06cf5252450b 100644
--- a/webrtc/p2p/base/stunrequest.cc
+++ b/webrtc/p2p/base/stunrequest.cc
@@ -138,7 +138,7 @@ bool StunRequestManager::CheckResponse(const char* data, size_t size) {
 
   // Parse the STUN message and continue processing as usual.
 
-  rtc::ByteBuffer buf(data, size);
+  rtc::ByteBufferReader buf(data, size);
   rtc::scoped_ptr<StunMessage> response(iter->second->msg_->CreateNew());
   if (!response->Read(&buf)) {
     LOG(LS_WARNING) << "Failed to read STUN response " << rtc::hex_encode(id);
@@ -213,7 +213,7 @@ void StunRequest::OnMessage(rtc::Message* pmsg) {
 
   tstamp_ = rtc::Time64();
 
-  rtc::ByteBuffer buf;
+  rtc::ByteBufferWriter buf;
   msg_->Write(&buf);
   manager_->SignalSendPacket(buf.Data(), buf.Length(), this);