Implement "pinned" mode in ash.

ash/accelerators/accelerator_table.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_table.h"
 
 #include "ash/strings/grit/ash_strings.h"
 #include "base/macros.h"
 
 namespace ash {
@@ skipping 535 matching lines @@
     TOGGLE_SPOKEN_FEEDBACK,
     TOGGLE_WIFI,
     VOLUME_DOWN,
     VOLUME_MUTE,
     VOLUME_UP,
 #endif  // defined(OS_CHROMEOS)
 };
 
 const size_t kActionsKeepingMenuOpenLength = arraysize(kActionsKeepingMenuOpen);
 
+const AcceleratorAction kActionsAllowedInPinnedMode[] = {

[oshima, 2016/06/18 04:47:44]

This disables accelerators for IME, accessibility etc.

Can't we just use ones for locked state?

[hidehiko, 2016/06/18 05:32:45]

Ah, good point. I shared some with in_app_mode ones.
Though, we should have a bit more, so I keep extra ones in this table.

+    TAKE_WINDOW_SCREENSHOT,
+    TAKE_PARTIAL_SCREENSHOT,
+    TAKE_SCREENSHOT,
+#if defined(OS_CHROMEOS)
+    BRIGHTNESS_DOWN,
+    BRIGHTNESS_UP,
+    KEYBOARD_BRIGHTNESS_DOWN,
+    KEYBOARD_BRIGHTNESS_UP,
+    LOCK_SCREEN,
+    POWER_PRESSED,
+    POWER_RELEASED,
+    SUSPEND,
+    VOLUME_DOWN,
+    VOLUME_MUTE,
+    VOLUME_UP,
+#endif
+};
+
+const size_t kActionsAllowedInPinnedModeLength =
+    arraysize(kActionsAllowedInPinnedMode);
+
 }  // namespace ash