Fix bug where many extensions don't install due to sandbox.

chrome/common/extensions/extension_l10n_util.h

 // Copyright (c) 2009 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.
 //
 // This file declares extension specific l10n utils.
 
-#ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_L10N_UTIL_H_
-#define CHROME_BROWSER_EXTENSIONS_EXTENSION_L10N_UTIL_H_
+#ifndef CHROME_COMMON_EXTENSIONS_EXTENSION_L10N_UTIL_H_
+#define CHROME_COMMON_EXTENSIONS_EXTENSION_L10N_UTIL_H_
 
 #include <set>
 #include <string>
 #include <vector>
 
 class DictionaryValue;
 class Extension;
 class ExtensionMessageBundle;
 class FilePath;
 
 namespace extension_l10n_util {
 
+// Set the locale for this process to a fixed value, rather than using the
+// normal file-based lookup mechanisms. This is used to set the locale inside
+// the sandboxed utility process, where file reading is not allowed.
+void SetProcessLocale(const std::string& locale);
+
 // Returns default locale in form "en-US" or "sr" or empty string if
 // "default_locale" section was not defined in the manifest.json file.
 std::string GetDefaultLocaleFromManifest(const DictionaryValue& manifest,
                                          std::string* error);
 
 // Adds locale_name to the extension if it's in chrome_locales, and
 // if messages file is present (we don't check content of messages file here).
 // Returns false if locale_name was not found in chrome_locales, and sets
 // error with locale_name.
 // If file name starts with . return true (helps testing extensions under svn).
@@ skipping 36 matching lines @@
     std::string* error);
 
 // Returns relative l10n paths to the resource.
 // Returned vector starts with more specific locale path, and ends with the
 // least specific one.
 void GetL10nRelativePaths(const FilePath& relative_resource_path,
                           std::vector<FilePath>* l10n_paths);
 
 }  // namespace extension_l10n_util
 
-#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_L10N_UTIL_H_
+#endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_L10N_UTIL_H_