Allow shared modules to whitelist extensions that import them.

chrome/browser/extensions/shared_module_apitest.cc

 // Copyright (c) 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/browser/extensions/extension_apitest.h"
 
 using extensions::Extension;
 
+// NB: We use LoadExtension instead of InstallExtension for shared modules so
+// the public-keys in their manifests are used to generate the extension ID, so
+// it can be imported correctly.  We use InstallExtension otherwise so the loads
+// happen through the CRX installer which validates imports.
+
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, SharedModule) {
   // import_pass depends on this shared module.
-  // NB: We use LoadExtension instead of InstallExtension here so the public-key
-  // in 'shared' is used to generate the extension ID so it can be imported
-  // correctly.  We use InstallExtension otherwise so the loads happen through
-  // the CRX installer which validates imports.
   ASSERT_TRUE(LoadExtension(
       test_data_dir_.AppendASCII("shared_module").AppendASCII("shared")));
 
   EXPECT_TRUE(RunExtensionTest("shared_module/import_pass"));
 
   EXPECT_FALSE(InstallExtension(
       test_data_dir_.AppendASCII("shared_module")
           .AppendASCII("import_wrong_version"), 0));
   EXPECT_FALSE(InstallExtension(
       test_data_dir_.AppendASCII("shared_module")
           .AppendASCII("import_non_existent"), 0));
 }
+
+IN_PROC_BROWSER_TEST_F(ExtensionApiTest, SharedModuleWhitelist) {
+  ASSERT_TRUE(LoadExtension(
+      test_data_dir_.AppendASCII("shared_module")
+          .AppendASCII("shared_whitelist")));
+
+  EXPECT_FALSE(InstallExtension(
+      test_data_dir_.AppendASCII("shared_module")
+          .AppendASCII("import_not_in_whitelist"), 0));
+}