Get `gn gen` to succeed on Windows

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 406 matching lines @@
       "dragdrop/os_exchange_data_provider_aura.h",
     ]
   }
 
   libs = []
   if (is_win) {
     sources += [
       "cursor/cursor_loader_win.cc",
       "cursor/cursor_loader_win.h",
     ]
-    deps += [
-      "//third_party/wtl",
-    ]
     cflags = [
       "/wd4267",  # TODO(jschuh): C4267: http://crbug.com/167187 size_t -> int.
       "/wd4324",  # Structure was padded due to __declspec(align()), which is
                   # uninteresting.
     ]
     ldflags = [
       "/DELAYLOAD:d2d1.dll",
       "/DELAYLOAD:d3d10_1.dll",
       "/DELAYLOAD:dwmapi.dll",
     ]
@@ skipping 355 matching lines @@
       "//chromeos",
       "//ui/aura:test_support",
       "//ui/events:gesture_detection",
       "//ui/chromeos:ui_chromeos",
     ]
   }
 }
 }
 }
 # TODO(GYP) Mac (ui_unittest_bundle) and Android (ui_unittests_apk).