Update base::StartsWith calls to new form

chrome/browser/extensions/api/identity/gaia_web_auth_flow.cc

 // Copyright (c) 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 "chrome/browser/extensions/api/identity/gaia_web_auth_flow.h"
 
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
@@ skipping 161 matching lines @@
   const char kOAuth2RedirectErrorKey[] = "error";
   const char kOAuth2ExpiresInKey[] = "expires_in";
 
   // The format of the target URL is:
   //     reversed.oauth.client.id:/extensionid#access_token=TOKEN
   //
   // Because there is no double slash, everything after the scheme is
   // interpreted as a path, including the fragment.
 
   if (url.scheme() == redirect_scheme_ && !url.has_host() && !url.has_port() &&
-      base::StartsWithASCII(url.GetContent(), redirect_path_prefix_, true)) {
+      base::StartsWith(url.GetContent(), redirect_path_prefix_,
+                       base::CompareCase::SENSITIVE)) {
     web_flow_.release()->DetachDelegateAndDelete();
 
     std::string fragment = url.GetContent().substr(
         redirect_path_prefix_.length(), std::string::npos);
     base::StringPairs pairs;
     base::SplitStringIntoKeyValuePairs(fragment, '=', '&', &pairs);
     std::string access_token;
     std::string error;
     std::string expiration;
 
@@ skipping 23 matching lines @@
     }
   }
 }
 
 void GaiaWebAuthFlow::OnAuthFlowTitleChange(const std::string& title) {
   // On the final page the title will be "Loading <redirect-url>".
   // Treat it as though we'd really been redirected to <redirect-url>.
   const char kRedirectPrefix[] = "Loading ";
   std::string prefix(kRedirectPrefix);
 
-  if (base::StartsWithASCII(title, prefix, true)) {
+  if (base::StartsWith(title, prefix, base::CompareCase::SENSITIVE)) {
     GURL url(title.substr(prefix.length(), std::string::npos));
     if (url.is_valid())
       OnAuthFlowURLChange(url);
   }
 }
 
 scoped_ptr<WebAuthFlow> GaiaWebAuthFlow::CreateWebAuthFlow(GURL url) {
   return scoped_ptr<WebAuthFlow>(new WebAuthFlow(this,
                                                  profile_,
                                                  url,
                                                  WebAuthFlow::INTERACTIVE));
 }
 
 }  // namespace extensions