Refactor Pickle Read methods to use higher performance PickleIterator.

net/http/http_vary_data.cc

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
 #include "net/http/http_vary_data.h"
 
 #include <stdlib.h>
 
 #include "base/pickle.h"
 #include "base/string_util.h"
 #include "net/http/http_request_headers.h"
@@ skipping 45 matching lines @@
     processed_header = true;
   }
 
   if (!processed_header)
     return false;
 
   base::MD5Final(&request_digest_, &ctx);
   return is_valid_ = true;
 }
 
-bool HttpVaryData::InitFromPickle(const Pickle& pickle, void** iter) {
+bool HttpVaryData::InitFromPickle(const Pickle& pickle, PickleIterator* iter) {
   is_valid_ = false;
   const char* data;
   if (pickle.ReadBytes(iter, &data, sizeof(request_digest_))) {
     memcpy(&request_digest_, data, sizeof(request_digest_));
     return is_valid_ = true;
   }
   return false;
 }
 
 void HttpVaryData::Persist(Pickle* pickle) const {
@@ skipping 39 matching lines @@
   // Append a character that cannot appear in the request header line so that we
   // protect against case where the concatenation of two request headers could
   // look the same for a variety of values for the individual request headers.
   // For example, "foo: 12\nbar: 3" looks like "foo: 1\nbar: 23" otherwise.
   request_value.append(1, '\n');
 
   base::MD5Update(ctx, request_value);
 }
 
 }  // namespace net