Regression: Search+Key pops up app launcher

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/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_manager.h",
     "android/system_ui_resource_type.h",
     "android/ui_base_jni_registrar.cc",
@@ skipping 874 matching lines @@
       "dragdrop/os_exchange_data_provider_aurax11_unittest.cc",
       "x/selection_requestor_unittest.cc",
     ]
     deps += [
       "//chromeos",
     ]
   }
 }
 }
 # TODO(GYP) Mac (ui_unittest_bundle) and Android (ui_unittests_apk).