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

chrome/browser/extensions/events_apitest.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "extensions/browser/event_router.h"
 #include "extensions/browser/extension_registry.h"
 
@@ skipping 27 matching lines @@
       test_data_dir_.AppendASCII(test_extension_name);
   const Extension* extension =
       GetExtensionByPath(registry->enabled_extensions(), extension_path);
   ASSERT_TRUE(extension) << "No extension found at \"" << extension_path.value()
                          << "\" (absolute path \""
                          << base::MakeAbsoluteFilePath(extension_path).value()
                          << "\")";
   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(
       event_router->ExtensionHasEventListener(id, "runtime.onStartup"));
   EXPECT_FALSE(
       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