Move implementation from header to source.

chrome/browser/command_updater.h

 // Copyright (c) 2010 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 CHROME_BROWSER_COMMAND_UPDATER_H_
 #define CHROME_BROWSER_COMMAND_UPDATER_H_
 
 #include "base/basictypes.h"
 #include "base/hash_tables.h"
 
 ////////////////////////////////////////////////////////////////////////////////
 //
 // CommandUpdater class
 //
 //   This object manages the enabled state of a set of commands. Observers
 //   register to listen to changes in this state so they can update their
 //   presentation.
 //
 class CommandUpdater {
  public:
   // A Delegate object implements this interface so that it can execute commands
   // when needed.
   class CommandUpdaterDelegate {
    public:
     // Perform the action associated with the command with the specified ID.
     virtual void ExecuteCommand(int id) = 0;
 
    protected:
-    virtual ~CommandUpdaterDelegate() {}
+    virtual ~CommandUpdaterDelegate();
   };
 
   // Create a CommandUpdater with a CommandUpdaterDelegate to handle execution
   // of specific commands.
   explicit CommandUpdater(CommandUpdaterDelegate* handler);
   virtual ~CommandUpdater();
 
   // Returns true if the specified command ID is supported.
   bool SupportsCommand(int id) const;
 
   // Returns true if the specified command ID is enabled. The command ID must be
   // supported by this updater.
   bool IsCommandEnabled(int id) const;
 
   // Performs the action associated with this command ID.
   // TODO(beng): get rid of this since it's effectively just a pass-thru and the
   // call sites would be better off using more well defined delegate interfaces.
   void ExecuteCommand(int id);
 
   // An Observer interface implemented by objects that want to be informed when
   // the state of a particular command ID is modified.
   class CommandObserver {
    public:
     // Notifies the observer that the enabled state has changed for the
     // specified command id.
     virtual void EnabledStateChangedForCommand(int id, bool enabled) = 0;
 
    protected:
-    virtual ~CommandObserver() {}
+    virtual ~CommandObserver();
   };
 
   // Adds an observer to the state of a particular command. If the command does
   // not exist, it is created, initialized to false.
   void AddCommandObserver(int id, CommandObserver* observer);
 
   // Removes an observer to the state of a particular command.
   void RemoveCommandObserver(int id, CommandObserver* observer);
 
   // Removes |observer| for all commands on which it's registered.
@@ skipping 19 matching lines @@
 
   // This is a map of command IDs to states and observer lists
   typedef base::hash_map<int, Command*> CommandMap;
   CommandMap commands_;
 
   CommandUpdater();
   DISALLOW_COPY_AND_ASSIGN(CommandUpdater);
 };
 
 #endif  // CHROME_BROWSER_COMMAND_UPDATER_H_