Remove Profile-keyed factory boilerplate: cookies, managed_mode & web_navigation

chrome/browser/extensions/api/managed_mode/managed_mode_api.cc

Index: chrome/browser/extensions/api/managed_mode/managed_mode_api.cc
diff --git a/chrome/browser/extensions/api/managed_mode/managed_mode_api.cc b/chrome/browser/extensions/api/managed_mode/managed_mode_api.cc
index 5224430e81cbcd77f56acfe24072c7831beccc8c..41dd3be98ec3e840760d5fcd7592ffb1959f1246 100644
--- a/chrome/browser/extensions/api/managed_mode/managed_mode_api.cc
+++ b/chrome/browser/extensions/api/managed_mode/managed_mode_api.cc
@@ -10,6 +10,7 @@
 
 #include "base/bind.h"
 #include "base/json/json_writer.h"
+#include "base/lazy_instance.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/api/preference/preference_api_constants.h"
 #include "chrome/browser/extensions/event_router.h"
@@ -142,4 +143,13 @@ void ManagedModeAPI::OnListenerAdded(
   ExtensionSystem::Get(profile_)->event_router()->UnregisterObserver(this);
 }
 
+static base::LazyInstance<ProfileKeyedAPIFactory<ManagedModeAPI> >
+g_factory = LAZY_INSTANCE_INITIALIZER;
+
+template <>
+ProfileKeyedAPIFactory<ManagedModeAPI>*
+ProfileKeyedAPIFactory<ManagedModeAPI>::GetInstance() {
+  return &g_factory.Get();
+}
+
 }  // namespace extensions