Split ExtensionSystem interface from ExtensionSystemImpl implementation, part 1.

chrome/browser/ui/omnibox/location_bar.cc

Index: chrome/browser/ui/omnibox/location_bar.cc
diff --git a/chrome/browser/ui/omnibox/location_bar.cc b/chrome/browser/ui/omnibox/location_bar.cc
index 5f6d279023663ce0b4a49f25aacbdf96d5fd9ef2..c0ac254bce0cc900bf99c9f891e3eacfa83120bb 100644
--- a/chrome/browser/ui/omnibox/location_bar.cc
+++ b/chrome/browser/ui/omnibox/location_bar.cc
@@ -5,9 +5,9 @@
 #include "chrome/browser/ui/omnibox/location_bar.h"
 
 #include "chrome/browser/extensions/extension_service.h"
-#include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/extensions/manifest_handlers/settings_overrides_handler.h"
+#include "extensions/browser/extension_system.h"
 #include "extensions/common/extension_set.h"
 #include "extensions/common/feature_switch.h"
 #include "extensions/common/permissions/permissions_data.h"
@@ -21,8 +21,7 @@ LocationBar::~LocationBar() {
 
 bool LocationBar::IsBookmarkStarHiddenByExtension() const {
   const ExtensionService* extension_service =
-      extensions::ExtensionSystem::GetForBrowserContext(
-          profile_)->extension_service();
+      extensions::ExtensionSystem::Get(profile_)->extension_service();
   // Extension service may be NULL during unit test execution.
   if (!extension_service)
     return false;