Allow remapping modifier keys to Caps Lock and Backspace

chrome/browser/chromeos/events/event_rewriter.cc

 // Copyright 2014 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 "chrome/browser/chromeos/events/event_rewriter.h"
 
 #include <stddef.h>
 
 #include <vector>
 
@@ skipping 801 matching lines @@
       pressed_modifier_latches_ &= ~characteristic_flag;
   }
 
   if (key_event.type() == ui::ET_KEY_PRESSED) {
     if (!ui::KeycodeConverter::IsDomKeyForModifier(state->key)) {
       used_modifier_latches_ |= pressed_modifier_latches_;
       latched_modifier_latches_ = ui::EF_NONE;
     }
     // Toggle Caps Lock if the remapped key is ui::VKEY_CAPITAL.
     if (state->key_code == ui::VKEY_CAPITAL
+        // ... except on linux Chrome OS, where InputMethodChromeOS handles it.
+        && (base::SysInfo::IsRunningOnChromeOS() || ime_keyboard_for_testing_)
 #if defined(USE_X11)
         // ... but for X11, do nothing if the original key is ui::VKEY_CAPITAL
         // (i.e. a Caps Lock key on an external keyboard is pressed) since X
         // handles that itself.
         && incoming.key_code != ui::VKEY_CAPITAL
 #endif
         ) {
       chromeos::input_method::ImeKeyboard* ime_keyboard =
           ime_keyboard_for_testing_
               ? ime_keyboard_for_testing_
@@ skipping 310 matching lines @@
   for (const auto& keyboard : keyboard_devices) {
     if (keyboard.id == device_id) {
       return KeyboardDeviceAddedInternal(
           keyboard.id, keyboard.name, keyboard.vendor_id, keyboard.product_id);
     }
   }
   return kDeviceUnknown;
 }
 
 }  // namespace chromeos