Add laser pointer palette code w/o laser pointer impelmentation

ash/common/system/chromeos/palette/tools/laser_pointer_mode.h

Index: ash/common/system/chromeos/palette/tools/laser_pointer_mode.h
diff --git a/ash/common/system/chromeos/palette/tools/laser_pointer_mode.h b/ash/common/system/chromeos/palette/tools/laser_pointer_mode.h
new file mode 100644
index 0000000000000000000000000000000000000000..59a8cb46a39c00c981633c9b4dd3287783836286
--- /dev/null
+++ b/ash/common/system/chromeos/palette/tools/laser_pointer_mode.h
@@ -0,0 +1,31 @@
+// Copyright 2016 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 ASH_COMMON_SYSTEM_CHROMEOS_PALETTE_LASER_POINTER_MODE_H_
+#define ASH_COMMON_SYSTEM_CHROMEOS_PALETTE_LASER_POINTER_MODE_H_
+
+#include "ash/common/system/chromeos/palette/common_palette_tool.h"
+
+namespace ash {
+
+class LaserPointerMode : public CommonPaletteTool {
+ public:
+  explicit LaserPointerMode(Delegate* delegate);
+  ~LaserPointerMode() override;
+
+ private:
+  // PaletteTool overrides.
+  PaletteGroup GetGroup() const override;
+  PaletteToolId GetToolId() const override;
+  gfx::VectorIconId GetActiveTrayIcon() override;
+
+  // CommonPaletteTool overrides.
+  gfx::VectorIconId GetPaletteIconId() override;
+
+  DISALLOW_COPY_AND_ASSIGN(LaserPointerMode);
+};
+
+}  // namespace ash
+
+#endif  // ASH_COMMON_SYSTEM_CHROMEOS_PALETTE_LASER_POINTER_MODE_H_