chromeos: Add NoteTakingHelper class.

chrome/browser/chromeos/note_taking_helper.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 CHROME_BROWSER_CHROMEOS_NOTE_TAKING_HELPER_H_
+#define CHROME_BROWSER_CHROMEOS_NOTE_TAKING_HELPER_H_
+
+#include <base/macros.h>
+
+class Profile;
+
+namespace base {
+class FilePath;
+}  // namespace base
+
+namespace chromeos {
+
+// Singleton class used to launch a note-taking app.
+class NoteTakingHelper {
+ public:
+  static void Initialize();
+  static void Shutdown();

[Daniel Erat, 2016/12/02 01:07:55]

should be "ShutDown" but i'm matching what we call it everywhere else :-/

+  static NoteTakingHelper* Get();
+
+  // Returns true if an app that can be used to take notes is available. UI
+  // surfaces that call LaunchAppForNewNote() should be hidden otherwise.
+  bool IsAppAvailable(Profile* profile);
+
+  // Launches the note-taking app to create a new note, optionally additionally
+  // passing a file (|path| may be empty). IsAppAvailable() must be called
+  // first.
+  void LaunchAppForNewNote(Profile* profile, const base::FilePath& path);
+
+ private:
+  NoteTakingHelper();
+  ~NoteTakingHelper();
+
+  DISALLOW_COPY_AND_ASSIGN(NoteTakingHelper);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_NOTE_TAKING_HELPER_H_