app_shell: Add experimental shellPrivate extension API

extensions/browser/api/shell_private/shell_private_api_unittest.cc

Index: extensions/browser/api/shell_private/shell_private_api_unittest.cc
diff --git a/extensions/browser/api/shell_private/shell_private_api_unittest.cc b/extensions/browser/api/shell_private/shell_private_api_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..bbfb8f944e64f5d0e192753b85b58a48d2f35ba3
--- /dev/null
+++ b/extensions/browser/api/shell_private/shell_private_api_unittest.cc
@@ -0,0 +1,25 @@
+// 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/browser/api/shell_private/shell_private_api.h"
+
+#include "base/memory/scoped_ptr.h"
+#include "base/values.h"
+#include "extensions/browser/api_unittest.h"
+
+namespace extensions {
+
+typedef ApiUnitTest ShellPrivateApiTest;
+
+// Verifies that the printHello function exists and can be called without
+// crashing.
+TEST_F(ShellPrivateApiTest, PrintHello) {
+  scoped_ptr<base::Value> result =
+      RunFunctionAndReturnValue(new ShellPrivatePrintHelloFunction, "[]");
+
+  // Function returns nothing.
+  EXPECT_FALSE(result.get());
+}
+
+}  // namespace extensions