Test extension reloading behavior.

content/public/test/test_notification_tracker.cc

Index: content/public/test/test_notification_tracker.cc
diff --git a/content/public/test/test_notification_tracker.cc b/content/public/test/test_notification_tracker.cc
index bf166e724ae2fdae6670e7383bc9d42b41bf1214..6ab7f2a0af8878d5dc05b45c269c1206ecb0ba87 100644
--- a/content/public/test/test_notification_tracker.cc
+++ b/content/public/test/test_notification_tracker.cc
@@ -34,6 +34,11 @@ void TestNotificationTracker::ListenFor(
   registrar_.Add(this, type, source);
 }
 
+void TestNotificationTracker::ListenForAll(int type) {
+  registrar_.Add(this, type,
+                 NotificationService::AllBrowserContextsAndSources());
+}
+
 void TestNotificationTracker::Reset() {
   events_.clear();
 }
@@ -73,6 +78,13 @@ bool TestNotificationTracker::Check3AndReset(int type1,
   return success;
 }
 
+std::vector<int> TestNotificationTracker::GetTypes() const {
+  std::vector<int> types;
+  for (size_t i = 0; i < size(); ++i)
+    types.push_back(at(i).type);
+  return types;
+}
+
 void TestNotificationTracker::Observe(
     int type,
     const NotificationSource& source,