Use base::StringPairs where appropriate from src/chrome/browser

chrome/browser/ui/sync/one_click_signin_helper.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.
 
 #include "chrome/browser/ui/sync/one_click_signin_helper.h"
 
 #include <algorithm>
 #include <functional>
 #include <utility>
 #include <vector>
@@ skipping 954 matching lines @@
       !google_chrome_signin_value.empty()) {
     VLOG(1) << "OneClickSigninHelper::ShowInfoBarIfPossible:"
             << " g-a-s='" << google_accounts_signin_value << "'"
             << " g-c-s='" << google_chrome_signin_value << "'";
   }
 
   if (!gaia::IsGaiaSignonRealm(request->url().GetOrigin()))
     return;
 
   // Parse Google-Accounts-SignIn.
-  std::vector<std::pair<std::string, std::string> > pairs;
+  base::StringPairs pairs;
   base::SplitStringIntoKeyValuePairs(google_accounts_signin_value, '=', ',',
                                      &pairs);
   std::string session_index;
   std::string email;
   for (size_t i = 0; i < pairs.size(); ++i) {
     const std::pair<std::string, std::string>& pair = pairs[i];
     const std::string& key = pair.first;
     const std::string& value = pair.second;
     if (key == "email") {
       base::TrimString(value, "\"", &email);
@@ skipping 611 matching lines @@
     // If the web contents is showing a blank page and not about to be closed,
     // redirect to the NTP or apps page.
     if (signin::IsContinueUrlForWebBasedSigninFlow(current_url) &&
         !signin::IsAutoCloseEnabledInURL(original_continue_url_)) {
       RedirectToNtpOrAppsPage(
           web_contents(),
           signin::GetSourceForPromoURL(original_continue_url_));
     }
   }
 }