Add QuicFramer and friends.

net/quic/quic_utils.h

Index: net/quic/quic_utils.h
diff --git a/net/quic/quic_utils.h b/net/quic/quic_utils.h
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+// Copyright (c) 2012 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.
+//
+// Some helpers for quic
+
+#ifndef NET_QUIC_QUIC_UTILS_H_
+#define NET_QUIC_QUIC_UTILS_H_
+
+#include <string>
+
+#include "net/base/net_export.h"
+#include "net/quic/quic_protocol.h"
+#include "net/quic/uint128.h"
+
+class SocketAddress;
+
+namespace gfe2 {
+  class BalsaHeaders;
+}
+
+namespace net {
+
+class NET_EXPORT_PRIVATE QuicUtils {
+ public:
+  // The overhead the quic framing will add for a packet with num_fragments
+  // fragments.
+  static int StreamFragmentPacketOverhead(int num_fragments);
+
+  // returns the 128 bit FNV1a hash of the data.  See
+  // http://www.isthe.com/chongo/tech/comp/fnv/index.html#FNV-param
+  static uint128 FNV1a_128_Hash(const char* data, int len);
+
+  // Returns the name of the quic error code as a char*
+  static const char* ErrorToString(QuicErrorCode error);
+};
+
+}  // namespace net
+
+#endif  // NET_QUIC_QUIC_UTILS_H_