MacViews: Fix duplicate definition of ExtensionKeyBindingRegistry::SetShortcutHandlingSuspended

ui/base/BUILD.gn

 # 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.
 
 import("//build/config/ui.gni")
 
 if (is_android) {
   import("//build/config/android/config.gni")
   import("//build/config/android/rules.gni")
 }
 
 build_ime = !is_ios
 
 component("base") {
   output_name = "ui_base"
   sources = [
     "accelerators/accelerator.cc",
     "accelerators/accelerator.h",
     "accelerators/accelerator_history.cc",
     "accelerators/accelerator_history.h",
     "accelerators/accelerator_manager.cc",
     "accelerators/accelerator_manager.h",
+    "accelerators/accelerator_processor.h",
     "accelerators/menu_label_accelerator_util_linux.cc",
     "accelerators/menu_label_accelerator_util_linux.h",
     "accelerators/platform_accelerator.h",
     "accelerators/platform_accelerator_cocoa.h",
     "accelerators/platform_accelerator_cocoa.mm",
     "android/system_ui_resource_type.h",
     "android/ui_base_jni_registrar.cc",
     "android/ui_base_jni_registrar.h",
     "android/view_android.cc",
     "android/view_android.h",
@@ skipping 865 matching lines @@
         "x/selection_requestor_unittest.cc",
       ]
     }
 
     if (is_chromeos) {
       deps += [ "//chromeos" ]
     }
   }
 }
 # TODO(GYP) Mac (ui_base_tests_bundle) and Android (ui_base_unittests_apk).