Use of base::StringPairs appropriately in nacl.

components/nacl/renderer/json_manifest.cc

 // Copyright 2014 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 "components/nacl/renderer/json_manifest.h"
 
 #include <set>
 
 #include "base/logging.h"
 #include "base/macros.h"
@@ skipping 424 matching lines @@
     error_info->string =
         "could not resolve url '" + nexe_url +
         "' relative to manifest base url '" + manifest_base_url_.c_str() +
         "'.";
     return false;
   }
   *full_url = resolved_gurl.possibly_invalid_spec();
   return true;
 }
 
-void JsonManifest::GetPrefetchableFiles(
-    std::vector<std::pair<std::string, std::string> >* out_files) const {
+void JsonManifest::GetPrefetchableFiles(base::StringPairs* out_files) const {
   const Json::Value& files = dictionary_[kFilesKey];
   if (!files.isObject())
     return;
 
   Json::Value::Members keys = files.getMemberNames();
   for (size_t i = 0; i < keys.size(); ++i) {
     std::string full_url;
     PP_PNaClOptions unused_pnacl_options;  // pnacl does not support "files".
     // We skip invalid entries in "files".
     if (GetKeyUrl(files, keys[i], &full_url, &unused_pnacl_options)) {
@@ skipping 188 matching lines @@
   } else {
     // NaCl
     *url = isa_spec[kUrlKey].asString();
     pnacl_options->translate = PP_FALSE;
   }
 
   return true;
 }
 
 }  // namespace nacl