Tweaks to get views compiling with mojo

ui/native_theme/native_theme_android.cc

 // 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.
 
 #include "ui/native_theme/native_theme_android.h"
 
 #include "base/basictypes.h"
 #include "base/logging.h"
 
 namespace ui {
 
+#if !defined(USE_AURA)
 // static
 NativeTheme* NativeTheme::instance() {
   return NativeThemeAndroid::instance();
 }
+#endif
 
 // static
 NativeThemeAndroid* NativeThemeAndroid::instance() {
   CR_DEFINE_STATIC_LOCAL(NativeThemeAndroid, s_native_theme, ());
   return &s_native_theme;
 }
 
 SkColor NativeThemeAndroid::GetSystemColor(ColorId color_id) const {
   NOTIMPLEMENTED();
   return SK_ColorBLACK;
 }
 
 NativeThemeAndroid::NativeThemeAndroid() {
 }
 
 NativeThemeAndroid::~NativeThemeAndroid() {
 }
 
 }  // namespace ui