Remove legacy StartsWithASCII function.

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 592 matching lines @@
 }
 
 // Convert a URL to a filename for GetReadonlyPnaclFd.
 // Must be kept in sync with PnaclCanOpenFile() in
 // components/nacl/browser/nacl_file_host.cc.
 std::string PnaclComponentURLToFilename(const std::string& url) {
   // PNaCl component URLs aren't arbitrary URLs; they are always either
   // generated from ManifestResolveKey or PnaclResources::ReadResourceInfo.
   // So, it's safe to just use string parsing operations here instead of
   // URL-parsing ones.
-  DCHECK(base::StartsWithASCII(url, kPNaClTranslatorBaseUrl, true));
+  DCHECK(base::StartsWith(url, kPNaClTranslatorBaseUrl,
+                          base::CompareCase::SENSITIVE));
   std::string r = url.substr(std::string(kPNaClTranslatorBaseUrl).length());
 
   // Use white-listed-chars.
   size_t replace_pos;
   static const char* white_list = "abcdefghijklmnopqrstuvwxyz0123456789_";
   replace_pos = r.find_first_not_of(white_list);
   while(replace_pos != std::string::npos) {
     r = r.replace(replace_pos, 1, "_");
     replace_pos = r.find_first_not_of(white_list);
   }
@@ skipping 1077 matching lines @@
   &StreamPexe
 };
 
 }  // namespace
 
 const PPB_NaCl_Private* GetNaClPrivateInterface() {
   return &nacl_interface;
 }
 
 }  // namespace nacl