Revert 257524 "Move IsStringASCII/UTF8 to base namespace."

trunk/src/chrome/common/extensions/manifest_handlers/content_scripts_handler.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/common/extensions/manifest_handlers/content_scripts_handler.h"
 
 #include "base/file_util.h"
 #include "base/lazy_instance.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 286 matching lines @@
                           std::string* error) {
   std::string content;
   if (!base::PathExists(path) ||
       !base::ReadFileToString(path, &content)) {
     *error = l10n_util::GetStringFUTF8(
         message_id,
         relative_path.LossyDisplayName());
     return false;
   }
 
-  if (!base::IsStringUTF8(content)) {
+  if (!IsStringUTF8(content)) {
     *error = l10n_util::GetStringFUTF8(
         IDS_EXTENSION_BAD_FILE_ENCODING,
         relative_path.LossyDisplayName());
     return false;
   }
 
   return true;
 }
 
 struct EmptyUserScriptList {
@@ skipping 141 matching lines @@
       if (!IsScriptValid(path, css_script.relative_path(),
                          IDS_EXTENSION_LOAD_CSS_FAILED, error))
         return false;
     }
   }
 
   return true;
 }
 
 }  // namespace extensions