Revert 273763 "Add garbage collection for shared extensions on C..."

trunk/src/chrome/browser/extensions/extension_garbage_collector_factory.cc

Index: trunk/src/chrome/browser/extensions/extension_garbage_collector_factory.cc
===================================================================
--- trunk/src/chrome/browser/extensions/extension_garbage_collector_factory.cc	(revision 273797)
+++ trunk/src/chrome/browser/extensions/extension_garbage_collector_factory.cc	(working copy)
@@ -11,10 +11,6 @@
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "extensions/browser/extensions_browser_client.h"
 
-#if defined(OS_CHROMEOS)
-#include "chrome/browser/extensions/extension_garbage_collector_chromeos.h"
-#endif
-
 namespace extensions {
 
 // static
@@ -44,11 +40,7 @@
 // static
 KeyedService* ExtensionGarbageCollectorFactory::BuildInstanceFor(
     content::BrowserContext* context) {
-#if defined(OS_CHROMEOS)
-  return new ExtensionGarbageCollectorChromeOS(context);
-#else
   return new ExtensionGarbageCollector(context);
-#endif
 }
 
 KeyedService* ExtensionGarbageCollectorFactory::BuildServiceInstanceFor(