Move quic_flags.h from net/quic/core to net/quic/platform and split into api and impl.

net/quic/core/quic_headers_stream.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/quic/core/quic_headers_stream.h"
 
-#include "net/quic/core/quic_flags.h"
 #include "net/quic/core/quic_spdy_session.h"
+#include "net/quic/platform/api/quic_flags.h"
 
 namespace net {
 
 QuicHeadersStream::QuicHeadersStream(QuicSpdySession* session)
     : QuicStream(kHeadersStreamId, session), spdy_session_(session) {
   // The headers stream is exempt from connection level flow control.
   DisableConnectionFlowControlForThisStream();
 }
 
 QuicHeadersStream::~QuicHeadersStream() {}
@@ skipping 18 matching lines @@
   }
 }
 
 void QuicHeadersStream::MaybeReleaseSequencerBuffer() {
   if (spdy_session_->ShouldReleaseHeadersStreamSequencerBuffer()) {
     sequencer()->ReleaseBufferIfEmpty();
   }
 }
 
 }  // namespace net