FBTF: Move a bunch of code to the headers and remove includes.

chrome/browser/automation/automation_extension_tracker.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_AUTOMATION_AUTOMATION_EXTENSION_TRACKER_H_
 #define CHROME_BROWSER_AUTOMATION_AUTOMATION_EXTENSION_TRACKER_H_
 #pragma once
 
 #include "chrome/browser/automation/automation_resource_tracker.h"
 
 class Extension;
 
 // Tracks an Extension. An Extension is removed on uninstall, not on disable.
 class AutomationExtensionTracker
     : public AutomationResourceTracker<Extension*> {
  public:
   explicit AutomationExtensionTracker(IPC::Message::Sender* automation);
 
   virtual ~AutomationExtensionTracker();
 
   // This is empty because we do not want to add an observer for every
   // extension added to the tracker. This is because the profile, not the
   // extension, is the one who sends the notification about extension
   // uninstalls. Instead of using this method, one observer is added for all
   // extensions in the constructor.
-  virtual void AddObserver(Extension* resource) {}
+  virtual void AddObserver(Extension* resource);
 
   // See related comment above as to why this method is empty.
-  virtual void RemoveObserver(Extension* resource) {}
+  virtual void RemoveObserver(Extension* resource);
 
   // Overriding AutomationResourceTracker Observe. AutomationResourceTracker's
   // Observe expects the NotificationSource to be the object that is closing.
   // This is not true for the relevant extension notifications, so we have to
   // the observation ourselves.
   virtual void Observe(NotificationType type,
                        const NotificationSource& source,
                        const NotificationDetails& details);
 };
 
 #endif  // CHROME_BROWSER_AUTOMATION_AUTOMATION_EXTENSION_TRACKER_H_