Use of base::StringPairs appropriately in nacl.

components/nacl/renderer/ppb_nacl_private_impl.cc

 // Copyright 2013 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/ppb_nacl_private_impl.h"
 
 #include <numeric>
 #include <string>
 #include <vector>
 
@@ skipping 402 matching lines @@
   if (load_manager->DevInterfacesEnabled())
     perm_bits |= ppapi::PERMISSION_DEV;
   instance_info.permissions =
       ppapi::PpapiPermissions::GetForCommandLine(perm_bits);
   std::string error_message_string;
   NaClLaunchResult launch_result;
 
   IPC::PlatformFileForTransit nexe_for_transit =
       IPC::InvalidPlatformFileForTransit();
 
-  std::vector<std::pair<
-    std::string /*key*/, std::string /*url*/> > resource_files_to_prefetch;
+  base::StringPairs resource_files_to_prefetch;
   if (process_type == kNativeNaClProcessType && uses_nonsfi_mode) {
     JsonManifest* manifest = GetJsonManifest(instance);
     if (manifest)
       manifest->GetPrefetchableFiles(&resource_files_to_prefetch);
     for (size_t i = 0; i < resource_files_to_prefetch.size(); ++i) {
       const GURL gurl(resource_files_to_prefetch[i].second);
       // Important security check. Do not remove.
       if (!CanOpenViaFastPath(plugin_instance, gurl)) {
         resource_files_to_prefetch.clear();
         break;
@@ skipping 1272 matching lines @@
   &StreamPexe
 };
 
 }  // namespace
 
 const PPB_NaCl_Private* GetNaClPrivateInterface() {
   return &nacl_interface;
 }
 
 }  // namespace nacl