Set locale for extension tests, keep it from affecting global state

chrome/common/extensions/extension_l10n_util.h

 // 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.
 //
 // This file declares extension specific l10n utils.
 
 #ifndef CHROME_COMMON_EXTENSIONS_EXTENSION_L10N_UTIL_H_
 #define CHROME_COMMON_EXTENSIONS_EXTENSION_L10N_UTIL_H_
 
 #include <set>
@@ skipping 89 matching lines @@
 
 // Returns true if directory has "." in the name (for .svn) or if it doesn't
 // belong to Chrome locales.
 // |locales_path| is extension_id/_locales
 // |locale_path| is extension_id/_locales/xx
 // |all_locales| is a set of all valid Chrome locales.
 bool ShouldSkipValidation(const FilePath& locales_path,
                           const FilePath& locale_path,
                           const std::set<std::string>& all_locales);
 
+// Sets the process locale for the duration of the current scope, then reverts
+// back to whatever the current locale was before constructing this.
+// For testing purposed only!
+class ScopedLocaleForTest {
+ public:
+  // Only revert back to current locale at end of scope, don't set locale.
+  ScopedLocaleForTest();
+
+  // Set temporary locale for the current scope
+  explicit ScopedLocaleForTest(const std::string& locale);
+
+  ~ScopedLocaleForTest();
+
+ private:
+  std::string locale_;  // The current locale at ctor time.
+};
+
+
 }  // namespace extension_l10n_util
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_L10N_UTIL_H_