Cleanup: Constify some ProfileKeyedBaseFactory methods and all overrides. Remove ProfileKeyedBaseFa…

chrome/browser/plugin_prefs_factory.cc

Index: chrome/browser/plugin_prefs_factory.cc
===================================================================
--- chrome/browser/plugin_prefs_factory.cc	(revision 154991)
+++ chrome/browser/plugin_prefs_factory.cc	(working copy)
@@ -69,14 +69,14 @@
                           PrefService::UNSYNCABLE_PREF);
 }
 
-bool PluginPrefsFactory::ServiceRedirectedInIncognito() {
+bool PluginPrefsFactory::ServiceRedirectedInIncognito() const {
   return true;
 }
 
-bool PluginPrefsFactory::ServiceIsNULLWhileTesting() {
+bool PluginPrefsFactory::ServiceIsNULLWhileTesting() const {
   return true;
 }
 
-bool PluginPrefsFactory::ServiceIsCreatedWithProfile() {
+bool PluginPrefsFactory::ServiceIsCreatedWithProfile() const {
   return true;
 }