Sort out build dependencies for LinuxUI.

ui/linux_ui/linux_ui.gyp

 # Copyright (c) 2012 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
-      'target_name': 'native_theme',
+      'target_name': 'linux_ui',
       'type': '<(component)',
       'dependencies': [
         '../../base/base.gyp:base',
         '../../base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
         '../../skia/skia.gyp:skia',
         '../ui.gyp:ui',
         '../ui.gyp:ui_resources',
+        '../native_theme/native_theme.gyp:native_theme',
       ],
       'defines': [
-        'NATIVE_THEME_IMPLEMENTATION',
+        'LINUX_UI_IMPLEMENTATION',
       ],
       'sources': [
-        'common_theme.cc',
-        'common_theme.h',
-        'native_theme.cc',
-        'native_theme.h',
-        'native_theme_android.cc',
-        'native_theme_android.h',
-        'native_theme_aura.cc',
-        'native_theme_aura.h',
-        'native_theme_base.cc',
-        'native_theme_base.h',
-        'native_theme_gtk.cc',
-        'native_theme_gtk.h',
-        'native_theme_mac.h',
-        'native_theme_mac.mm',
-        'native_theme_win.cc',
-        'native_theme_win.h',
+        'linux_ui.cc',
+        'linux_ui.h',
+        'linux_ui_export.h',
       ],
     },
   ],
 }