Clear an extension's filtered events when a context is destroyed.

chrome/browser/extensions/events_apitest.cc

Index: chrome/browser/extensions/events_apitest.cc
diff --git a/chrome/browser/extensions/events_apitest.cc b/chrome/browser/extensions/events_apitest.cc
index 6184bb6b28452638bfb38e901ed74f2aab9cd40e..8787df1e60d083be72a850e2172ccf85857c39bf 100644
--- a/chrome/browser/extensions/events_apitest.cc
+++ b/chrome/browser/extensions/events_apitest.cc
@@ -45,7 +45,7 @@ IN_PROC_BROWSER_TEST_F(ExtensionApiTest, EventsAreUnregistered) {
   const std::string& id = extension->id();
 
   // The page has closed, so no matter what all events are no longer listened
-  // to.
+  // to. Assertions for normal events:
   EXPECT_FALSE(
       event_router->ExtensionHasEventListener(id, "browserAction.onClicked"));
   EXPECT_FALSE(
@@ -54,6 +54,15 @@ IN_PROC_BROWSER_TEST_F(ExtensionApiTest, EventsAreUnregistered) {
       event_router->ExtensionHasEventListener(id, "runtime.onSuspend"));
   EXPECT_FALSE(
       event_router->ExtensionHasEventListener(id, "runtime.onInstalled"));
+  // Assertions for filtered events:
+  EXPECT_FALSE(event_router->ExtensionHasEventListener(
+      id, "webNavigation.onBeforeNavigate"));
+  EXPECT_FALSE(
+      event_router->ExtensionHasEventListener(id, "webNavigation.onCommitted"));
+  EXPECT_FALSE(event_router->ExtensionHasEventListener(
+      id, "webNavigation.onDOMContentLoaded"));
+  EXPECT_FALSE(
+      event_router->ExtensionHasEventListener(id, "webNavigation.onCompleted"));
 }
 
 }  // namespace extensions