Move the event attach/detach logic on unload from event.js to

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 3420022dc8b3ba664a153583b7ed8d65c89ae699..8ebff3cdde31b65addb609e32e3b2014ce54f129 100644
--- a/chrome/browser/extensions/events_apitest.cc
+++ b/chrome/browser/extensions/events_apitest.cc
@@ -2,8 +2,51 @@
 // 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"
+
+namespace extensions {
 
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, Events) {
   ASSERT_TRUE(RunExtensionTest("events")) << message_;
 }
+
+// Tests that events are unregistered when an extension page shuts down.
+IN_PROC_BROWSER_TEST_F(ExtensionApiTest, EventsAreUnregistered) {
+  // In this test, page1.html registers for a number of events, then navigates
+  // to page2.html, which should unregister those events. page2.html notifies
+  // pass, by which point the event should have been unregistered.
+  EventRouter* event_router = EventRouter::Get(profile());
+  ExtensionRegistry* registry = ExtensionRegistry::Get(profile());
+
+  std::string test_extension_name = "events_are_unregistered";
+  ASSERT_TRUE(RunExtensionSubtest(test_extension_name, "page1.html"))
+      << message_;
+
+  // Find the extension we just installed by looking for the path.
+  base::FilePath extension_path =
+      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.
+  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"));
+}
+
+}  // namespace extensions