GN build: GPU work, Windows compile, "check" errors

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")
 }
@@ skipping 501 matching lines @@
     "test/ui_controls_internal_win.cc",
     "test/ui_controls_internal_win.h",
     "test/ui_controls_mac.mm",
     "test/ui_controls_win.cc",
   ]
 
   deps = [
     "//base",
     "//skia",
     "//testing/gtest",
+    "//ui/events:events_base",
     "//ui/gfx",
     "//ui/gfx/geometry",
   ]
 
   if (!is_ios) {
     sources += [
       "ime/dummy_input_method.cc",
       "ime/dummy_input_method.h",
       "ime/dummy_text_input_client.cc",
       "ime/dummy_text_input_client.h",
     ]
   }
 }
 
 if (is_android) {
   generate_jni("ui_base_jni_headers") {
     sources = [
       "../android/java/src/org/chromium/ui/base/Clipboard.java",
       "../android/java/src/org/chromium/ui/base/DeviceFormFactor.java",
       "../android/java/src/org/chromium/ui/base/LocalizationUtils.java",
       "../android/java/src/org/chromium/ui/base/SelectFileDialog.java",
       "../android/java/src/org/chromium/ui/base/TouchDevice.java",
       "../android/java/src/org/chromium/ui/base/ViewAndroid.java",
       "../android/java/src/org/chromium/ui/base/WindowAndroid.java",
     ]
     jni_package = "base"
   }
 }