Add stubs for a NULL renderer.

BUG=angleproject:1468

Change-Id: I2ed2b65a4b6f6ea3dda61c0467aef95e407cd38c
Reviewed-on: https://chromium-review.googlesource.com/388844
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>
diff --git a/src/libANGLE/renderer/null/DeviceNULL.cpp b/src/libANGLE/renderer/null/DeviceNULL.cpp
new file mode 100644
index 0000000..4893f94
--- /dev/null
+++ b/src/libANGLE/renderer/null/DeviceNULL.cpp
@@ -0,0 +1,48 @@
+//
+// Copyright 2016 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// DeviceNULL.cpp:
+//    Implements the class methods for DeviceNULL.
+//
+
+#include "libANGLE/renderer/null/DeviceNULL.h"
+
+#include "common/debug.h"
+
+namespace rx
+{
+
+DeviceNULL::DeviceNULL() : DeviceImpl()
+{
+}
+
+DeviceNULL::~DeviceNULL()
+{
+}
+
+egl::Error DeviceNULL::getDevice(void **outValue)
+{
+    UNIMPLEMENTED();
+    return egl::Error(EGL_BAD_ACCESS);
+}
+
+EGLint DeviceNULL::getType()
+{
+    UNIMPLEMENTED();
+    return EGLint();
+}
+
+void DeviceNULL::generateExtensions(egl::DeviceExtensions *outExtensions) const
+{
+    UNIMPLEMENTED();
+}
+
+bool DeviceNULL::deviceExternallySourced()
+{
+    UNIMPLEMENTED();
+    return bool();
+}
+
+}  // namespace rx