Add ash to the 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.
 
 import("//build/config/ui.gni")
 
 # In GN, a "group" is a dummy target that just lists other targets.
 group("root") {
   # Note that some dependencies are commented out. These are things that are
   # currently written but not hooked up to the build yet. They may need to be
   # completed or possibly just tested and then re-enabled.
   deps = [
     # This is a temporary test of the not-yet-complete NaCl cross-compilation.
     #"//base(//build/toolchain/nacl:x86_newlib)",
-
+    "//ash",
     "//cc",
     "//chrome/browser",
     "//chrome/browser/devtools",
     "//chrome/browser/ui",
     "//chrome/browser/ui/views",
     "//chrome/common",
     "//chrome/plugin",
     "//chrome/renderer",
     "//chrome/service",
     "//chrome/utility",
@@ skipping 123 matching lines @@
       "//extensions/common/api",
       "//pdf",  # Not compiled on Android in GYP yet, either.
       "//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",
 
+      # Not relevant to Android.
+      "//ash",
       "//tools/gn",
       "//ui/aura",
 
       # 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",
     ]
   }
 }