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

chrome/browser/profiles/profile_impl.h

Index: chrome/browser/profiles/profile_impl.h
diff --git a/chrome/browser/profiles/profile_impl.h b/chrome/browser/profiles/profile_impl.h
index 2742279b8e5cc1d05dd99e6e876d66053bbf545c..01dfc362a735898fc5fe52ee49a02d2f0d85851e 100644
--- a/chrome/browser/profiles/profile_impl.h
+++ b/chrome/browser/profiles/profile_impl.h
@@ -316,6 +316,20 @@ class ProfileImpl : public Profile,
 
   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_;