Add GL and WGL renderer stubs.

BUG=angle:890

Change-Id: I64f2a72b4a350f95acc2ca7080fea1a308422ca4
Reviewed-on: https://chromium-review.googlesource.com/242573
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Brandon Jones <bajones@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>
diff --git a/src/libANGLE/renderer/gl/RenderbufferGL.cpp b/src/libANGLE/renderer/gl/RenderbufferGL.cpp
new file mode 100644
index 0000000..b082ad7
--- /dev/null
+++ b/src/libANGLE/renderer/gl/RenderbufferGL.cpp
@@ -0,0 +1,29 @@
+//
+// Copyright 2015 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.
+//
+
+// RenderbufferGL.cpp: Implements the class methods for RenderbufferGL.
+
+#include "libANGLE/renderer/gl/RenderbufferGL.h"
+
+#include "common/debug.h"
+
+namespace rx
+{
+
+RenderbufferGL::RenderbufferGL()
+    : RenderbufferImpl()
+{}
+
+RenderbufferGL::~RenderbufferGL()
+{}
+
+gl::Error RenderbufferGL::setStorage(GLsizei width, GLsizei height, GLenum internalformat, GLsizei samples)
+{
+    UNIMPLEMENTED();
+    return gl::Error(GL_INVALID_OPERATION);
+}
+
+}