Reland 'Convert //net and //chromecast to std::unordered_*'

net/http/http_response_headers.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.
 
 // The rules for header parsing were borrowed from Firefox:
 // http://lxr.mozilla.org/seamonkey/source/netwerk/protocol/http/src/nsHttpResponseHead.cpp
 // The rules for parsing content-types were also borrowed from Firefox:
 // http://lxr.mozilla.org/mozilla/source/netwerk/base/src/nsURLHelper.cpp#834
 
 #include "net/http/http_response_headers.h"
 
 #include <algorithm>
+#include <unordered_map>
 #include <utility>
 
 #include "base/format_macros.h"
 #include "base/logging.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/pickle.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
@@ skipping 427 matching lines @@
   // header data, so we build a map from header name to generated header lines.
   // to preserve the order of the original headers, the actual values are kept
   // in a separate list.  finally, the list of headers is flattened to form
   // the normalized block of headers.
   //
   // NOTE: We take special care to preserve the whitespace around any commas
   // that may occur in the original response headers.  Because our consumer may
   // be a web app, we cannot be certain of the semantics of commas despite the
   // fact that RFC 2616 says that they should be regarded as value separators.
   //
-  typedef base::hash_map<std::string, size_t> HeadersMap;
+  using HeadersMap = std::unordered_map<std::string, size_t>;
   HeadersMap headers_map;
   HeadersMap::iterator iter = headers_map.end();
 
   std::vector<std::string> headers;
 
   for (size_t i = 0; i < parsed_.size(); ++i) {
     DCHECK(!parsed_[i].is_continuation());
 
     std::string name(parsed_[i].name_begin, parsed_[i].name_end);
     std::string lower_name = base::ToLowerASCII(name);
@@ skipping 993 matching lines @@
   return true;
 }
 
 bool HttpResponseHeaders::IsChunkEncoded() const {
   // Ignore spurious chunked responses from HTTP/1.0 servers and proxies.
   return GetHttpVersion() >= HttpVersion(1, 1) &&
       HasHeaderValue("Transfer-Encoding", "chunked");
 }
 
 }  // namespace net