Remove QuicUtils::AsChars by casting directly. No behavior change.

net/quic/core/quic_utils.h

 // 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_CORE_QUIC_UTILS_H_
 #define NET_QUIC_CORE_QUIC_UTILS_H_
 
 #include <stddef.h>
@@ skipping 53 matching lines @@
   static const char* TransmissionTypeToString(TransmissionType type);
 
   // Returns the list of QUIC tags represented by the comma separated
   // string in |connection_options|.
   static QuicTagVector ParseQuicConnectionOptions(
       const std::string& connection_options);
 
   // Returns PeerAddressChangeType as a std::string.
   static std::string PeerAddressChangeTypeToString(PeerAddressChangeType type);
 
-  static char* AsChars(unsigned char* data) {
-    return reinterpret_cast<char*>(data);
-  }
-
   // Deletes all the sub-frames contained in |frames|.
   static void DeleteFrames(QuicFrames* frames);
 
   // Deletes all the QuicStreamFrames for the specified |stream_id|.
   static void RemoveFramesForStream(QuicFrames* frames, QuicStreamId stream_id);
 
   // Deletes and clears all the frames and the packet from serialized packet.
   static void ClearSerializedPacket(SerializedPacket* serialized_packet);
 
   // Returns a packed representation of |path_id| and |packet_number| in which
@@ skipping 28 matching lines @@
   // "0x0000:  4865 6c6c 6f2c 2051 5549 4321 0102 0304  Hello,.QUIC!...."
   static std::string HexDump(base::StringPiece binary_data);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(QuicUtils);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_CORE_QUIC_UTILS_H_