aura: Fix file-opening functions in platform_util.

chrome/browser/platform_util_win.cc

 // Copyright (c) 2011 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 "chrome/browser/platform_util.h"
 
 #include <commdlg.h>
 #include <dwmapi.h>
 #include <shellapi.h>
 #include <shlobj.h>
@@ skipping 156 matching lines @@
   if (reinterpret_cast<ULONG_PTR>(ShellExecuteA(NULL, "open",
                                                 escaped_url.c_str(), NULL, NULL,
                                                 SW_SHOWNORMAL)) <= 32) {
     // We fail to execute the call. We could display a message to the user.
     // TODO(nsylvain): we should also add a dialog to warn on errors. See
     // bug 1136923.
     return;
   }
 }
 
+#if !defined(USE_AURA)
 gfx::NativeWindow GetTopLevel(gfx::NativeView view) {
   return ::GetAncestor(view, GA_ROOT);
 }
 
 gfx::NativeView GetParent(gfx::NativeView view) {
   return ::GetParent(view);
 }
 
 bool IsWindowActive(gfx::NativeWindow window) {
   return ::GetForegroundWindow() == window;
 }
 
 void ActivateWindow(gfx::NativeWindow window) {
   ::SetForegroundWindow(window);
 }
 
 bool IsVisible(gfx::NativeView view) {
   // MSVC complains if we don't include != 0.
   return ::IsWindowVisible(view) != 0;
 }
+#endif
 
 }  // namespace platform_util