Add create note palette action.

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

+// 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_CREATE_NOTE_ACTION_H_
+#define ASH_COMMON_SYSTEM_CHROMEOS_PALETTE_CREATE_NOTE_ACTION_H_
+
+#include <memory>

[James Cook, 2016/08/16 22:08:44]

nit: not needed?

[jdufault, 2016/08/16 22:45:51]

Done.

+
+#include "ash/ash_export.h"
+#include "ash/common/system/chromeos/palette/common_palette_tool.h"
+#include "base/macros.h"
+
+namespace ash {
+
+// A button in the ash palette that launches the selected note-taking app when
+// clicked. This action dynamically hides itself if it is not available.
+class ASH_EXPORT CreateNoteAction : public CommonPaletteTool {
+ public:
+  explicit CreateNoteAction(Delegate* delegate);
+  ~CreateNoteAction() override;
+
+ private:
+  // PaletteTool overrides.
+  PaletteGroup GetGroup() const override;
+  PaletteToolId GetToolId() const override;
+  void OnEnable() override;
+  views::View* CreateView() override;
+
+  // CommonPaletteTool overrides.
+  gfx::VectorIconId GetPaletteIconId() override;
+
+  DISALLOW_COPY_AND_ASSIGN(CreateNoteAction);
+};
+
+}  // namespace ash
+
+#endif  // ASH_COMMON_SYSTEM_CHROMEOS_PALETTE_CREATE_NOTE_ACTION_H_