[Extensions Bindings] Notify of event unregistration on invalidation

extensions/renderer/api_bindings_system_unittest.cc

Index: extensions/renderer/api_bindings_system_unittest.cc
diff --git a/extensions/renderer/api_bindings_system_unittest.cc b/extensions/renderer/api_bindings_system_unittest.cc
index 64889c7c9cc558d5d3afc6a6004df1008e31db12..36789bc6e6019de81b5d2ddd30ee2e5be8935fcc 100644
--- a/extensions/renderer/api_bindings_system_unittest.cc
+++ b/extensions/renderer/api_bindings_system_unittest.cc
@@ -122,6 +122,10 @@ class APIBindingsSystemTestBase : public APIBindingTest {
   }
 
   void TearDown() override {
+    {
+      v8::HandleScope handle_scope(isolate());
+      bindings_system_->WillReleaseContext(ContextLocal());
+    }
     bindings_system_.reset();
     APIBindingTest::TearDown();
   }