Move ExtensionSystem into extensions namespace

chrome/browser/profiles/profile_manager.cc

Index: chrome/browser/profiles/profile_manager.cc
diff --git a/chrome/browser/profiles/profile_manager.cc b/chrome/browser/profiles/profile_manager.cc
index 0a7b5842d95439f430b180c3585e7a81a94d04c4..8fd475d64d73a59c585426a91294d051782975ec 100644
--- a/chrome/browser/profiles/profile_manager.cc
+++ b/chrome/browser/profiles/profile_manager.cc
@@ -648,12 +648,12 @@ void ProfileManager::DoFinalInit(Profile* profile, bool go_off_the_record) {
 void ProfileManager::DoFinalInitForServices(Profile* profile,
                                             bool go_off_the_record) {
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
-  ExtensionSystem::Get(profile)->Init(!go_off_the_record);
+  extensions::ExtensionSystem::Get(profile)->Init(!go_off_the_record);
   // During tests, when |profile| is an instance of TestingProfile,
   // ExtensionSystem might not create an ExtensionService.
-  if (ExtensionSystem::Get(profile)->extension_service()) {
+  if (extensions::ExtensionSystem::Get(profile)->extension_service()) {
     profile->GetHostContentSettingsMap()->RegisterExtensionService(
-        ExtensionSystem::Get(profile)->extension_service());
+        extensions::ExtensionSystem::Get(profile)->extension_service());
   }
   if (!command_line.HasSwitch(switches::kDisableWebResources))
     profile->InitPromoResources();