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

chrome/browser/ui/cocoa/command_observer_bridge.h

Index: chrome/browser/ui/cocoa/command_observer_bridge.h
===================================================================
--- chrome/browser/ui/cocoa/command_observer_bridge.h	(revision 144216)
+++ chrome/browser/ui/cocoa/command_observer_bridge.h	(working copy)
@@ -21,7 +21,7 @@
 // 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);
@@ -31,7 +31,7 @@
   void ObserveCommand(int command);
 
  protected:
-  // Overridden from CommandUpdater::CommandObserver
+  // Overridden from CommandObserver
   virtual void EnabledStateChangedForCommand(int command,
                                              bool enabled) OVERRIDE;