Move command handling and updating off Browser and onto a helper object.

chrome/browser/ui/cocoa/command_observer_bridge.h

 // Copyright (c) 2011 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_UI_COCOA_COMMAND_OBSERVER_BRIDGE
 #define CHROME_BROWSER_UI_COCOA_COMMAND_OBSERVER_BRIDGE
 #pragma once
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/compiler_specific.h"
-#include "chrome/browser/command_updater.h"
+#include "chrome/browser/command_observer.h"
 
 @protocol CommandObserverProtocol;
 
+class CommandUpdater;
+
 // A C++ bridge class that handles listening for updates to commands and
 // passing them back to an object that supports the protocol delcared below.
 // The observer will create one of these bridges, call ObserveCommand() on the
 // command ids it cares about, and then wait for update notifications,
 // delivered via -enabledStateChangedForCommand:enabled:. Destroying this
 // bridge will handle automatically unregistering for updates, so there's no
 // need to do that manually.
 
-class CommandObserverBridge : public CommandUpdater::CommandObserver {
+class CommandObserverBridge : public CommandObserver {
  public:
   CommandObserverBridge(id<CommandObserverProtocol> observer,
                         CommandUpdater* commands);
   virtual ~CommandObserverBridge();
 
   // Register for updates about |command|.
   void ObserveCommand(int command);
 
  protected:
-  // Overridden from CommandUpdater::CommandObserver
+  // Overridden from CommandObserver
   virtual void EnabledStateChangedForCommand(int command,
                                              bool enabled) OVERRIDE;
 
  private:
   id<CommandObserverProtocol> observer_;  // weak, owns me
   CommandUpdater* commands_;  // weak
 };
 
 // Implemented by the observing Objective-C object, called when there is a
 // state change for the given command.
 @protocol CommandObserverProtocol
 - (void)enabledStateChangedForCommand:(NSInteger)command enabled:(BOOL)enabled;
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_COMMAND_OBSERVER_BRIDGE