Fix platform checks in Clipboard.

ui/base/clipboard/clipboard.h

 // 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.
 
 #ifndef UI_BASE_CLIPBOARD_CLIPBOARD_H_
 #define UI_BASE_CLIPBOARD_CLIPBOARD_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 166 matching lines @@
   // CBF_DATA      format       char array
   //               data         byte array
   typedef std::vector<char> ObjectMapParam;
   typedef std::vector<ObjectMapParam> ObjectMapParams;
   typedef std::map<int /* ObjectType */, ObjectMapParams> ObjectMap;
 
   static bool IsSupportedClipboardType(int32 type) {
     switch (type) {
       case CLIPBOARD_TYPE_COPY_PASTE:
         return true;
-#if defined(USE_X11) && !defined(OS_CHROMEOS)
+#if !defined(OS_WIN) && !defined(OS_MACOSX) && !defined(OS_CHROMEOS)
       case CLIPBOARD_TYPE_SELECTION:
         return true;
 #endif
     }
     return false;
   }
 
   static ClipboardType FromInt(int32 type) {
     return static_cast<ClipboardType>(type);
   }
@@ skipping 194 matching lines @@
   class AuraX11Details;
   scoped_ptr<AuraX11Details> aurax11_details_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(Clipboard);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_CLIPBOARD_CLIPBOARD_H_