Remove some Profile-keyed factory boilerplate: management omnibox preference push_messaging.

chrome/browser/extensions/api/preference/preference_api.h

Index: chrome/browser/extensions/api/preference/preference_api.h
diff --git a/chrome/browser/extensions/api/preference/preference_api.h b/chrome/browser/extensions/api/preference/preference_api.h
index f7a799aec8cdfa5b432ce294c60cc94813843ebb..872567bd3ab8b7cdfe9e47ae445a853330522191 100644
--- a/chrome/browser/extensions/api/preference/preference_api.h
+++ b/chrome/browser/extensions/api/preference/preference_api.h
@@ -8,9 +8,9 @@
 #include <string>
 
 #include "base/prefs/public/pref_change_registrar.h"
+#include "chrome/browser/extensions/api/profile_keyed_api_factory.h"
 #include "chrome/browser/extensions/event_router.h"
 #include "chrome/browser/extensions/extension_function.h"
-#include "chrome/browser/profiles/profile_keyed_service.h"
 #include "content/public/browser/notification_observer.h"
 
 class PrefService;
@@ -39,7 +39,7 @@ class PreferenceEventRouter {
   DISALLOW_COPY_AND_ASSIGN(PreferenceEventRouter);
 };
 
-class PreferenceAPI : public ProfileKeyedService,
+class PreferenceAPI : public ProfileKeyedAPI,
                       public EventRouter::Observer {
  public:
   explicit PreferenceAPI(Profile* profile);
@@ -52,12 +52,26 @@ class PreferenceAPI : public ProfileKeyedService,
   virtual void OnListenerAdded(const EventListenerInfo& details) OVERRIDE;
 
  private:
+  friend class ProfileKeyedAPIFactory<PreferenceAPI>;
+
   Profile* profile_;
 
+  // ProfileKeyedAPI implementation.
+  static const char* service_name() {
+    return "PreferenceAPI";
+  }
+  static const bool kServiceIsNULLWhileTesting = true;
+
   // Created lazily upon OnListenerAdded.
   scoped_ptr<PreferenceEventRouter> preference_event_router_;
+
+  DISALLOW_COPY_AND_ASSIGN(PreferenceAPI);
 };
 
+template <>
+ProfileKeyedAPIFactory<PreferenceAPI>*
+ProfileKeyedAPIFactory<PreferenceAPI>::GetInstance();
+
 class PrefTransformerInterface {
  public:
   virtual ~PrefTransformerInterface() {}