Settings to remap Backspace and Escape keys

ui/base/ime/chromeos/ime_keyboard.h

Index: ui/base/ime/chromeos/ime_keyboard.h
diff --git a/ui/base/ime/chromeos/ime_keyboard.h b/ui/base/ime/chromeos/ime_keyboard.h
index 5b24bc654cf26528e52ba16267ce5f4c38046fcb..c731c9570cf1b8324baa4d7469162ec6c15cf1fb 100644
--- a/ui/base/ime/chromeos/ime_keyboard.h
+++ b/ui/base/ime/chromeos/ime_keyboard.h
@@ -25,9 +25,9 @@ enum ModifierKey {
   kControlKey,  // Customizable.
   kAltKey,  // Customizable.
   kVoidKey,
-  kCapsLockKey,
-  kEscapeKey,
-  kBackspaceKey,
+  kCapsLockKey,  // Customizable.
+  kEscapeKey,  // Customizable.
+  kBackspaceKey,  // Customizable.
   // IMPORTANT: Add new key to the end, because the keys may have been stored
   // in user preferences.
   kNumModifierKeys,