Removes an unused function in clipboard_linux as well as unused method...

base/clipboard.h

 // Copyright (c) 2009 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 BASE_CLIPBOARD_H_
 #define BASE_CLIPBOARD_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 175 matching lines @@
 #elif defined(OS_LINUX)
   // Data is stored in the |clipboard_data_| map until it is saved to the system
   // clipboard. The Store* functions save data to the |clipboard_data_| map. The
   // SetGtkClipboard function replaces whatever is on the system clipboard with
   // the contents of |clipboard_data_|.
   // The Write* functions make a deep copy of the data passed to them an store
   // it in |clipboard_data_|.
 
   // Write changes to gtk clipboard.
   void SetGtkClipboard();
-  // Free pointers in clipboard_data_ and clear() the map.
-  void FreeTargetMap();
   // Insert a mapping into clipboard_data_.
   void InsertMapping(const char* key, char* data, size_t data_len);
 
   TargetMap* clipboard_data_;
   GtkClipboard* clipboard_;
 #endif
 
   DISALLOW_EVIL_CONSTRUCTORS(Clipboard);
 };
 
 #endif  // BASE_CLIPBOARD_H_