mash: Migrate [Keyboard]Brightness code to ash/common.

ash/test/ash_test_base.h

 // 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 ASH_TEST_ASH_TEST_BASE_H_
 #define ASH_TEST_ASH_TEST_BASE_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 23 matching lines @@
 }
 }
 
 namespace aura {
 class RootWindow;
 class Window;
 class WindowDelegate;
 }  // namespace aura
 
 namespace ash {
+class BrightnessControlDelegate;
 class DisplayManager;
 class SystemTray;
 class WmShelf;
 
 namespace test {
 
 class AshTestHelper;
 class TestScreenshotDelegate;
 class TestSystemTrayDelegate;
 #if defined(OS_WIN)
@@ skipping 92 matching lines @@
   void SetShouldLockScreenBeforeSuspending(bool should_lock);
   void SetUserAddingScreenRunning(bool user_adding_screen_running);
 
   // Methods to emulate blocking and unblocking user session with given
   // |block_reason|.
   void BlockUserSession(UserSessionBlockReason block_reason);
   void UnblockUserSession();
 
   void DisableIME();
 
+  void SetBrightnessControlDelegate(

[James Cook, 2016/07/07 23:08:50]

Yeah, I'd prefer to friend the test or tests if there are only going to be a
couple places that need it.

[msw, 2016/07/08 01:40:48]

Done.

+      std::unique_ptr<BrightnessControlDelegate> brightness_control_delegate);
+
  private:
   bool setup_called_;
   bool teardown_called_;
   // |SetUp()| doesn't activate session if this is set to false.
   bool start_session_;
   std::unique_ptr<content::TestBrowserThreadBundle> thread_bundle_;
   std::unique_ptr<AshTestHelper> ash_test_helper_;
   std::unique_ptr<ui::test::EventGenerator> event_generator_;
 #if defined(OS_WIN)
   ui::ScopedOleInitializer ole_initializer_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(AshTestBase);
 };
 
 class NoSessionAshTestBase : public AshTestBase {
  public:
   NoSessionAshTestBase() { set_start_session(false); }
   ~NoSessionAshTestBase() override {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(NoSessionAshTestBase);
 };
 
 }  // namespace test
 }  // namespace ash
 
 #endif  // ASH_TEST_ASH_TEST_BASE_H_