Make all content scripts from an extension run in the same

chrome/browser/extensions/isolated_world_apitest.cc

+// Copyright (c) 2009 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"
+
+IN_PROC_BROWSER_TEST_F(ExtensionApiTest, IsolatedWorld1) {
+  // This extension runs various bits of script and tests that they all run in
+  // the same isolated world.
+  StartHTTPServer();
+  ASSERT_TRUE(RunExtensionTest("isolated_world1")) << message_;
+
+  // Now load a different extension, inject into same page, verify worlds aren't
+  // shared.
+  ASSERT_TRUE(RunExtensionTest("isolated_world2")) << message_;
+}