Move StringToUpperASCII and LowerCaseEqualsASCII to the base namespace

chrome/browser/extensions/api/web_request/web_request_api_helpers.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/extensions/api/web_request/web_request_api_helpers.h"
 
 #include <cmath>
 
 #include "base/bind.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 329 matching lines @@
     void* iter = NULL;
     std::string name;
     std::string value;
     while (old_response_headers->EnumerateHeaderLines(&iter, &name, &value)) {
       std::string name_lowercase(name);
       base::StringToLowerASCII(&name_lowercase);
 
       bool header_found = false;
       for (ResponseHeaders::const_iterator i = new_response_headers->begin();
            i != new_response_headers->end(); ++i) {
-        if (LowerCaseEqualsASCII(i->first, name_lowercase.c_str()) &&
+        if (base::LowerCaseEqualsASCII(i->first, name_lowercase.c_str()) &&
             value == i->second) {
           header_found = true;
           break;
         }
       }
       if (!header_found)
         result->deleted_response_headers.push_back(ResponseHeader(name, value));
     }
   }
 
@@ skipping 886 matching lines @@
   return net::HttpUtil::IsToken(name);
 }
 
 bool IsValidHeaderValue(const std::string& value) {
   // Just a sanity check: disallow NUL and CRLF.
   return value.find('\0') == std::string::npos &&
       value.find("\r\n") == std::string::npos;
 }
 
 }  // namespace extension_web_request_api_helpers