[SPDY] Add flag and about:flags entry for SPDY/4 alpha 1

net/spdy/spdy_framer.cc

 // 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.
 
 // TODO(rtenhove) clean up frame buffer size calculations so that we aren't
 // constantly adding and subtracting header sizes; this is ugly and error-
 // prone.
 
 #include "net/spdy/spdy_framer.h"
 
@@ skipping 33 matching lines @@
 
 // Adler ID for the SPDY header compressor dictionaries. Note that they are
 // initialized lazily to avoid static initializers.
 base::LazyInstance<DictionaryIds>::Leaky g_dictionary_ids;
 
 // Used to indicate no flags in a SPDY flags field.
 const uint8 kNoFlags = 0;
 
 }  // namespace
 
-const int SpdyFramer::kMinSpdyVersion = 2;
-const int SpdyFramer::kMaxSpdyVersion = 4;
+const int SpdyFramer::kMinSpdyVersion = kSpdyVersion2;
+const int SpdyFramer::kMaxSpdyVersion = kSpdyVersion4;
 const SpdyStreamId SpdyFramer::kInvalidStream = -1;
 const size_t SpdyFramer::kHeaderDataChunkMaxSize = 1024;
 // The size of the control frame buffer. Must be >= the minimum size of the
 // largest control frame, which is SYN_STREAM. See GetSynStreamMinimumSize() for
 // calculation details.
 const size_t SpdyFramer::kControlFrameBufferSize = 18;
 
 #ifdef DEBUG_SPDY_STATE_CHANGES
 #define CHANGE_STATE(newstate)                                  \
   do {                                                          \
@@ skipping 1991 matching lines @@
   post_compress_bytes.Add(compressed_size);
 
   compressed_frames.Increment();
 
   if (debug_visitor_ != NULL) {
     debug_visitor_->OnCompressedHeaderBlock(uncompressed_len, compressed_size);
   }
 }
 
 }  // namespace net