Adds Clipboard::Format::data() member to match android

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 100 matching lines @@
     //
     // Note that in some cases, the accessor for the wrapped descriptor may be
     // public, as these format types can be used by drag and drop code as well.
 #if defined(OS_WIN)
     explicit FormatType(UINT native_format);
     FormatType(UINT native_format, LONG index);
     UINT ToUINT() const { return data_.cfFormat; }
     FORMATETC data_;
 #elif defined(USE_AURA)
     explicit FormatType(const std::string& native_format);
+    const std::string& data() const { return data_; }
     std::string data_;
 #elif defined(OS_MACOSX)
     explicit FormatType(NSString* native_format);
     NSString* ToNSString() const { return data_; }
     NSString* data_;
 #elif defined(TOOLKIT_GTK)
     explicit FormatType(const std::string& native_format);
     explicit FormatType(const GdkAtom& native_format);
     const GdkAtom& ToGdkAtom() const { return data_; }
     GdkAtom data_;
@@ skipping 260 matching lines @@
   class AuraX11Details;
   scoped_ptr<AuraX11Details> aurax11_details_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(Clipboard);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_CLIPBOARD_CLIPBOARD_H_