Enable basic IME functionality under Ash on Windows

win8/metro_driver/ime/input_scope.h

Index: win8/metro_driver/ime/input_scope.h
diff --git a/win8/metro_driver/ime/input_scope.h b/win8/metro_driver/ime/input_scope.h
new file mode 100644
index 0000000000000000000000000000000000000000..97d84779b580be5c0f662c7e92422f06f0a34a31
--- /dev/null
+++ b/win8/metro_driver/ime/input_scope.h
@@ -0,0 +1,22 @@
+// 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.
+
+#ifndef WIN8_METRO_DRIVER_IME_INPUT_SCOPE_H_
+#define WIN8_METRO_DRIVER_IME_INPUT_SCOPE_H_
+
+#include <InputScope.h>
+#include <vector>
+
+#include "base/win/scoped_comptr.h"
+
+namespace metro_driver {
+
+// Returns an instance of ITfInputScope object, which represents an array of
+// InputScope enumeration passed as |input_scopes|.
+base::win::ScopedComPtr<ITfInputScope>
+CreteInputScope(const std::vector<InputScope>& input_scopes);
+
+}  // namespace metro_driver
+
+#endif  // WIN8_METRO_DRIVER_IME_TEXT_STORE_H_