Move ModuleSystemTest and the tests that use it into extensions/.

extensions/renderer/safe_builtins_unittest.cc

 // Copyright 2013 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/test/base/module_system_test.h"
+#include "extensions/renderer/module_system_test.h"
 
 namespace extensions {
 namespace {
 
 class SafeBuiltinsUnittest : public ModuleSystemTest {
 };
 
 TEST_F(SafeBuiltinsUnittest, TestNotOriginalObject) {
   ModuleSystem::NativesEnabledScope natives_enabled_scope(
       env()->module_system());
@@ skipping 42 matching lines @@
       "assert.AssertTrue(arr.length == 1);\n"
       "assert.AssertTrue(arr[0] == 1);\n");
   env()->module_system()->Require("test");
 }
 
 // NOTE: JSON is already tested in ExtensionApiTest.Messaging, via
 // chrome/test/data/extensions/api_test/messaging/connect/page.js.
 
 }  // namespace
 }  // namespace extensions