Reland this change. Registers paths for the testing exe, too....

app/app_paths.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.
+
+#ifndef APP_APP_PATHS_
+#define APP_APP_PATHS_
+
+// This file declares path keys for the app module.  These can be used with
+// the PathService to access various special directories and files.
+
+namespace app {
+
+enum {
+  PATH_START = 2000,
+
+  DIR_THEMES,            // directory where theme dll files are stored
+  DIR_LOCALES,           // directory where locale resources are stored
+
+  // Valid only in development environment; TODO(darin): move these
+  DIR_TEST_DATA,         // directory where unit test data resides
+
+  PATH_END
+};
+
+// Call once to register the provider for the path keys defined above.
+void RegisterPathProvider();
+
+}  // namespace app
+
+#endif  // #ifndef APP_APP_PATHS_