Remove the chrome include in extensions\DEPS by creating a test data directory for extensions.

extensions/common/extension_paths.h

+// 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.
+
+#ifndef EXTENSIONS_COMMON_EXTENSION_PATHS_H_
+#define EXTENSIONS_COMMON_EXTENSION_PATHS_H_
+
+// This file declares path keys for extensions.  These can be used with
+// the PathService to access various special directories and files.
+
+namespace extensions {
+
+enum {
+  PATH_START = 6000,
+
+  // Valid only in development environment
+  DIR_TEST_DATA,
+
+  PATH_END
+};
+
+// Call once to register the provider for the path keys defined above.
+void RegisterPathProvider();
+
+}  // namespace extensions
+
+#endif  // EXTENSIONS_COMMON_EXTENSION_PATHS_H_