AppShell: enable touch emulation from command line

extensions/shell/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/features.gni")
 import("//build/config/ui.gni")
 import("//build/util/process_version.gni")
 import("//extensions/features/features.gni")
 import("//testing/test.gni")
 import("//tools/grit/grit_rule.gni")
@@ skipping 42 matching lines @@
     "//extensions/shell/common/api:extensions_features",
     "//extensions/utility",
     "//skia",
     "//third_party/WebKit/public:blink",
     "//third_party/cld",
     "//ui/base",
     "//ui/base/ime",
     "//v8",
   ]
 
+  # TODO(michaelpg): remove Mac support and always use aura.
+  if (use_aura) {
+    deps += [ "//ui/aura" ]
+
+    if (use_x11) {
+      deps += [ "//ui/events" ]
+    }
+  }
+
   sources = [
     "app/paths_mac.h",
     "app/paths_mac.mm",
     "app/shell_main_delegate.cc",
     "app/shell_main_delegate.h",
     "browser/api/identity/identity_api.cc",
     "browser/api/identity/identity_api.h",
     "browser/default_shell_browser_main_delegate.cc",
     "browser/default_shell_browser_main_delegate.h",
     "browser/delegates/shell_kiosk_delegate.cc",
@@ skipping 278 matching lines @@
     "//extensions/browser",
   ]
 
   if (is_chromeos) {
     deps += [
       "//chromeos:test_support",
       "//components/keyed_service/content",
     ]
   }
 }