Add ExecuteJavaScriptForTest and make all tests use it

chrome/browser/extensions/alert_apitest.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 "base/strings/utf_string_conversions.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "components/app_modal/app_modal_dialog.h"
 #include "content/public/browser/render_frame_host.h"
 #include "extensions/browser/extension_host.h"
 #include "extensions/browser/process_manager.h"
 #include "extensions/common/extension.h"
 
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, AlertBasic) {
   ASSERT_TRUE(RunExtensionTest("alert")) << message_;
 
   const extensions::Extension* extension = GetSingleLoadedExtension();
   extensions::ExtensionHost* host =
       extensions::ProcessManager::Get(browser()->profile())
           ->GetBackgroundHostForExtension(extension->id());
   ASSERT_TRUE(host);
-  host->host_contents()->GetMainFrame()->ExecuteJavaScript(
+  host->host_contents()->GetMainFrame()->ExecuteJavaScriptForTests(
       base::ASCIIToUTF16("alert('This should not crash.');"));
 
   app_modal::AppModalDialog* alert = ui_test_utils::WaitForAppModalDialog();
   ASSERT_TRUE(alert);
   alert->CloseModalDialog();
 }