MacViews: Implement FormatType::operator< on Mac.

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 53 matching lines @@
 
   // Platform neutral holder for native data representation of a clipboard type.
   struct UI_BASE_EXPORT FormatType {
     FormatType();
     ~FormatType();
 
     // Serializes and deserializes a FormatType for use in IPC messages.
     std::string Serialize() const;
     static FormatType Deserialize(const std::string& serialization);
 
-#if defined(USE_AURA)
+#if defined(TOOLKIT_VIEWS)
     // FormatType can be used in a set on some platforms.
     bool operator<(const FormatType& other) const;
 #endif
 
 #if defined(OS_WIN)
     const FORMATETC& ToFormatEtc() const { return data_; }
 #elif defined(USE_AURA) || defined(OS_ANDROID)
     const std::string& ToString() const { return data_; }
 #elif defined(OS_MACOSX)
     NSString* ToNSString() const { return data_; }
@@ skipping 241 matching lines @@
   // TODO(dcheng): Remove the temporary exception for content.
   friend class content::ClipboardMessageFilter;
   friend class ScopedClipboardWriter;
 
   DISALLOW_COPY_AND_ASSIGN(Clipboard);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_CLIPBOARD_CLIPBOARD_H_