Some ui/BUILD.gn fixes.

ui/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")
 
 test("ui_unittests") {
   sources = [
     "base/layout_unittest.cc",
     "base/l10n/l10n_util_mac_unittest.mm",
@@ skipping 124 matching lines @@
     ]
     datadeps = [ "//tools/xdisplaycheck" ]
   }
 
   if (!is_win || !use_aura) {
     sources -= [ "base/view_prop_unittest.cc" ]
   }
 
   if (is_mac) {
     deps += [
-      #'../third_party/mozilla/mozilla.gyp:mozilla',  TODO(GYP)
+      "//third_party/mozilla",
       #'ui_unittests_bundle',  TODO(GYP)
     ]
-    if (!is_component_build) {
-      # Needed for mozilla.gyp.
-      ldflags = [ "-Wl,-ObjC" ]
-    }
   }
 
   if (use_aura || toolkit_views) {
     sources += [ "base/dragdrop/os_exchange_data_unittest.cc" ]
     deps += [
       "//ui/events",
       "//ui/events/platform",
     ]
   }
 
   if (is_chromeos) {
     sources += [
       "chromeos/touch_exploration_controller_unittest.cc",
     ]
     sources -= [
       "base/dragdrop/os_exchange_data_provider_aurax11_unittest.cc",
       "base/x/selection_requestor_unittest.cc",
     ]
     deps += [
       "//ui/aura:test_support",
+      "//ui/events:gesture_detection",
       #'../chromeos/chromeos.gyp:chromeos',  TODO(GYP)
       #'chromeos/ui_chromeos.gyp:ui_chromeos',
-      #'events/events.gyp:gesture_detection',
     ]
   }
 
 }
 
 # TODO(GYP) Mac (ui_unittest_bundle) and Android (ui_unittests_apk).