Add ui/views to GN build.

BUILD.gn

 # Copyright (c) 2013 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.
 
 # This is the root build file for GN. GN will start processing by loading this
 # file, and recursively load all dependencies until all dependencies are either
 # resolved or known not to exist (which will cause the build to fail). So if
 # you add a new build file, there must be some path of dependencies from this
 # file to your new one or GN won't know about it.
 
@@ skipping 83 matching lines @@
     "//ui/base",
     "//ui/events",
     "//ui/gfx",
     "//ui/gl",
     "//ui/keyboard",
     "//ui/native_theme",
     "//ui/resources",
     "//ui/snapshot",
     "//ui/strings",
     "//ui/surface",
+    "//ui/views",
     "//ui/web_dialogs",
     "//ui/wm",
     "//url",
     "//v8:v8",
     "//webkit/browser:storage",
     "//webkit/child",
   ]
 
   if (!is_win) {
     deps += [ "//breakpad:symupload" ]
@@ skipping 43 matching lines @@
       "//ppapi:ppapi_c",
       "//sandbox",
       "//third_party/libusb",
       "//ui/keyboard",  # Blocked on content.
 
       # Seems to not be compiled on Android. Otherwise it will need a config.h.
       "//third_party/libxslt",
 
       "//tools/gn",
       "//ui/aura",
+      "//ui/views",
 
       # Fails on Android for unknown reasons.
       "//third_party/flac",
       "//breakpad:symupload",
 
       # TODO(brettw) make Blink work on Android.
       "//third_party/WebKit/public:all_blink",
 
       # Not tested on Android yet:
       "//third_party/cld_2",
       "//third_party/libaddressinput",
       "//third_party/ffmpeg",
       "//ui/web_dialogs",
       "//ui/wm",
       "//webkit/browser:storage",
       "//webkit/child",
     ]
   }
 
   if (use_ozone) {
     deps += [
       "//ui/events/ozone:events_ozone",
       "//ui/events/ozone:events_ozone_evdev",
     ]
   }
 }