Profiles: Add a size check to ProfileImpl to make sure it no longer grows.

chrome/browser/profiles/profile_impl.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.
 
 // This class gathers state related to a single user profile.
 
 #ifndef CHROME_BROWSER_PROFILES_PROFILE_IMPL_H_
 #define CHROME_BROWSER_PROFILES_PROFILE_IMPL_H_
 #pragma once
 
@@ skipping 298 matching lines @@
   scoped_ptr<chromeos::EnterpriseExtensionObserver>
       chromeos_enterprise_extension_observer_;
 
   scoped_ptr<chromeos::LocaleChangeGuard> locale_change_guard_;
 #endif
 
   scoped_ptr<PrefProxyConfigTracker> pref_proxy_config_tracker_;
 
   scoped_ptr<ChromeURLDataManager> chrome_url_data_manager_;
 
+  // STOP!!!! DO NOT ADD ANY MORE ITEMS HERE!!!!
+  //
+  // Instead, make your Service/Manager/whatever object you're hanging off the
+  // Profile use our new ProfileKeyedServiceFactory system instead. You can
+  // find the design document here:
+  //
+  //   https://sites.google.com/a/chromium.org/dev/developers/design-documents/profile-architecture
+  //
+  // and you can read the raw headers here:
+  //
+  //   chrome/browser/profile/profile_keyed_service.h
+  //   chrome/browser/profile/profile_keyed_service_factory.{h,cc}
+  //   chrome/browser/profile/profile_keyed_dependency_manager.{h,cc}
+
   Profile::Delegate* delegate_;
 
   chrome_browser_net::Predictor* predictor_;
 
   bool session_restore_enabled_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileImpl);
 };
 
 #endif  // CHROME_BROWSER_PROFILES_PROFILE_IMPL_H_