Revert 184588 because it leaves the Exit menu disabled on all platforms.

ash/accelerators/accelerator_controller_unittest.cc

 // 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.
 
 #include "ash/accelerators/accelerator_controller.h"
 #include "ash/accelerators/accelerator_table.h"
 #include "ash/caps_lock_delegate.h"
 #include "ash/display/display_manager.h"
 #include "ash/ime_control_delegate.h"
 #include "ash/screenshot_delegate.h"
@@ skipping 838 matching lines @@
   // ToggleDesktopBackgroundMode
   EXPECT_TRUE(ProcessWithContext(
       ui::Accelerator(ui::VKEY_B, ui::EF_CONTROL_DOWN | ui::EF_ALT_DOWN)));
 #if !defined(OS_LINUX)
   // ToggleDesktopFullScreen (not implemented yet on Linux)
   EXPECT_TRUE(ProcessWithContext(
       ui::Accelerator(ui::VKEY_F11, ui::EF_CONTROL_DOWN)));
 #endif //  OS_LINUX
 #endif //  !NDEBUG
 
-#if !defined(OS_WIN)
   // Exit
   EXPECT_TRUE(ProcessWithContext(
       ui::Accelerator(ui::VKEY_Q, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN)));
-#endif
 
   // New tab
   EXPECT_TRUE(ProcessWithContext(
       ui::Accelerator(ui::VKEY_T, ui::EF_CONTROL_DOWN)));
 
   // New incognito window
   EXPECT_TRUE(ProcessWithContext(
       ui::Accelerator(ui::VKEY_N, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN)));
 
   // New window
@@ skipping 368 matching lines @@
     EXPECT_EQ(volume_down, delegate->last_accelerator());
     EXPECT_EQ(0, delegate->handle_volume_up_count());
     EXPECT_TRUE(ProcessWithContext(volume_up));
     EXPECT_EQ(1, delegate->handle_volume_up_count());
     EXPECT_EQ(volume_up, delegate->last_accelerator());
   }
 }
 #endif
 
 }  // namespace ash