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

extensions/renderer/event_unittest.cc

Index: extensions/renderer/event_unittest.cc
diff --git a/extensions/renderer/event_unittest.cc b/extensions/renderer/event_unittest.cc
index 9d3b68f0014980dffae42b48e934db200af85446..4144a01b0fa20aca037988e9f2c61ba49ffed656 100644
--- a/extensions/renderer/event_unittest.cc
+++ b/extensions/renderer/event_unittest.cc
@@ -18,6 +18,7 @@
     env()->RegisterModule(kSchemaUtils, IDR_SCHEMA_UTILS_JS);
     env()->RegisterModule("uncaught_exception_handler",
                           IDR_UNCAUGHT_EXCEPTION_HANDLER_JS);
+    env()->RegisterModule("unload_event", IDR_UNLOAD_EVENT_JS);
     env()->RegisterModule("utils", IDR_UTILS_JS);
 
     // Mock out the native handler for event_bindings. These mocks will fail if
@@ -87,6 +88,41 @@
       "myEvent.removeListener(cb1);"
       "assert.AssertTrue(!!eventNatives.attachedListeners['named-event']);"
       "myEvent.removeListener(cb2);"
+      "assert.AssertFalse(!!eventNatives.attachedListeners['named-event']);");
+  env()->module_system()->Require("test");
+}
+
+TEST_F(EventUnittest, OnUnloadDetachesAllListeners) {
+  ModuleSystem::NativesEnabledScope natives_enabled_scope(
+      env()->module_system());
+  env()->RegisterModule(
+      "test",
+      "var assert = requireNative('assert');"
+      "var Event = require('event_bindings').Event;"
+      "var eventNatives = requireNative('event_natives');"
+      "var myEvent = new Event('named-event');"
+      "var cb1 = function() {};"
+      "var cb2 = function() {};"
+      "myEvent.addListener(cb1);"
+      "myEvent.addListener(cb2);"
+      "require('unload_event').dispatch();"
+      "assert.AssertFalse(!!eventNatives.attachedListeners['named-event']);");
+  env()->module_system()->Require("test");
+}
+
+TEST_F(EventUnittest, OnUnloadDetachesAllListenersEvenDupes) {
+  ModuleSystem::NativesEnabledScope natives_enabled_scope(
+      env()->module_system());
+  env()->RegisterModule(
+      "test",
+      "var assert = requireNative('assert');"
+      "var Event = require('event_bindings').Event;"
+      "var eventNatives = requireNative('event_natives');"
+      "var myEvent = new Event('named-event');"
+      "var cb1 = function() {};"
+      "myEvent.addListener(cb1);"
+      "myEvent.addListener(cb1);"
+      "require('unload_event').dispatch();"
       "assert.AssertFalse(!!eventNatives.attachedListeners['named-event']);");
   env()->module_system()->Require("test");
 }