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

extensions/renderer/safe_builtins_unittest.cc

Index: extensions/renderer/safe_builtins_unittest.cc
diff --git a/chrome/renderer/extensions/safe_builtins_unittest.cc b/extensions/renderer/safe_builtins_unittest.cc
similarity index 95%
rename from chrome/renderer/extensions/safe_builtins_unittest.cc
rename to extensions/renderer/safe_builtins_unittest.cc
index 5b4f826fa02d174c656cf38757b4df84e1e8fb6f..0295c557844a8ce51dd2ff76efe40dfd23341e3c 100644
--- a/chrome/renderer/extensions/safe_builtins_unittest.cc
+++ b/extensions/renderer/safe_builtins_unittest.cc
@@ -2,13 +2,12 @@
 // 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 {
-};
+class SafeBuiltinsUnittest : public ModuleSystemTest {};
 
 TEST_F(SafeBuiltinsUnittest, TestNotOriginalObject) {
   ModuleSystem::NativesEnabledScope natives_enabled_scope(