Create ExtensionsRendererClient.

apps/shell/renderer/shell_extensions_renderer_client.cc

Index: apps/shell/renderer/shell_extensions_renderer_client.cc
diff --git a/apps/shell/renderer/shell_extensions_renderer_client.cc b/apps/shell/renderer/shell_extensions_renderer_client.cc
new file mode 100644
index 0000000000000000000000000000000000000000..98bef8fd36b7a5ed9ade6b57a1efee18bc9cac71
--- /dev/null
+++ b/apps/shell/renderer/shell_extensions_renderer_client.cc
@@ -0,0 +1,19 @@
+// 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 "apps/shell/renderer/shell_extensions_renderer_client.h"
+
+namespace apps {
+
+ShellExtensionsRendererClient::ShellExtensionsRendererClient() {}
+
+ShellExtensionsRendererClient::~ShellExtensionsRendererClient() {}
+
+bool ShellExtensionsRendererClient::IsIncognitoProcess() const { return false; }

[James Cook, 2014/04/14 22:15:50]

nit: Specifically comment that app_shell does not support off-the-record
browsing.

+
+int ShellExtensionsRendererClient::GetLowestIsolatedWorldId() const {
+  return 1;

[Yoyo Zhou, 2014/04/14 21:39:05]

What does this value mean? Document that we're not doing anything with it.

[James Cook, 2014/04/14 22:15:50]

ditto

+}
+
+}  // namespace apps