Add chrome.inputMethodPrivate.onImeMenuActivationChanged API.

chrome/browser/chromeos/extensions/input_method_apitest_chromeos.cc

 // Copyright (c) 2012 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 "chrome/browser/extensions/extension_apitest.h"
 
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/memory/ref_counted.h"
+#include "base/prefs/pref_service.h"
 #include "base/strings/stringprintf.h"
 #include "chrome/browser/chromeos/extensions/input_method_event_router.h"
 #include "chrome/browser/chromeos/input_method/input_method_util.h"
+#include "chrome/common/pref_names.h"
+#include "chromeos/chromeos_switches.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/notification_service.h"
 #include "extensions/common/switches.h"
 #include "extensions/browser/api/test/test_api.h"
 #include "extensions/browser/notification_types.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/base/ime/chromeos/extension_ime_util.h"
 #include "ui/base/ime/chromeos/input_method_manager.h"
 
@@ skipping 38 matching lines @@
  private:
   content::NotificationRegistrar registrar_;
 };
 
 class ExtensionInputMethodApiTest : public ExtensionApiTest {
   void SetUpCommandLine(base::CommandLine* command_line) override {
     ExtensionApiTest::SetUpCommandLine(command_line);
     command_line->AppendSwitchASCII(
         extensions::switches::kWhitelistedExtensionID,
         "ilanclmaeigfpnmdlgelmhkpkegdioip");
+    command_line->AppendSwitch(chromeos::switches::kEnableImeMenu);
   }
 };
 
 }  // namespace
 
 IN_PROC_BROWSER_TEST_F(ExtensionInputMethodApiTest, Basic) {
   // Listener for extension's background ready.
   TestListener listener;
 
+  browser()->profile()->GetPrefs()->SetBoolean(prefs::kLangugaeImeMenuActivated,
+                                               true);
   ASSERT_TRUE(RunExtensionTest("input_method")) << message_;
 }