Introduce chrome.shell.createWindow stub API for app_shell

extensions/renderer/test_extensions_renderer_client.cc

+// Copyright 2014 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 "extensions/renderer/test_extensions_renderer_client.h"
+
+namespace extensions {
+
+TestExtensionsRendererClient::TestExtensionsRendererClient() {}
+
+TestExtensionsRendererClient::~TestExtensionsRendererClient() {}
+
+bool TestExtensionsRendererClient::IsIncognitoProcess() const {
+  return false;
+}
+
+int TestExtensionsRendererClient::GetLowestIsolatedWorldId() const {
+  // Note that 0 is reserved for the global world.
+  return 1;
+}
+
+void TestExtensionsRendererClient::RegisterNativeHandlers(
+    extensions::ModuleSystem* module_system,
+    extensions::ScriptContext* context) {
+}
+
+void TestExtensionsRendererClient::PopulateSourceMap(
+    ResourceBundleSourceMap* source_map) {
+}
+
+}  // namespace extensions