Make reftests work for sky.

sky/compositor/display_delegate_ganesh.cc

Index: sky/compositor/display_delegate_ganesh.cc
diff --git a/sky/compositor/display_delegate_ganesh.cc b/sky/compositor/display_delegate_ganesh.cc
new file mode 100644
index 0000000000000000000000000000000000000000..0d93c968b2e3ee4dbc70d18403416a52f9ac727c
--- /dev/null
+++ b/sky/compositor/display_delegate_ganesh.cc
@@ -0,0 +1,27 @@
+// 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 "sky/compositor/display_delegate_ganesh.h"
+
+#include "sky/compositor/layer_client.h"
+#include "third_party/skia/include/core/SkCanvas.h"
+
+namespace sky {
+
+DisplayDelegate* DisplayDelegateGanesh::create(LayerClient* client) {
+  return new DisplayDelegateGanesh(client);
+}
+
+void DisplayDelegateGanesh::GetPixelsForTesting(std::vector<unsigned char>* pixels) {
+  // TODO(ojan): When we change notifyTestComplete to only GetPixelsForTesting
+  // in pixel/ref tests, add a NOTREACHED() here.
+}
+
+void DisplayDelegateGanesh::Paint(mojo::GaneshSurface& surface, const gfx::Rect& size) {
+  SkCanvas* canvas = surface.canvas();
+  client_->PaintContents(canvas, size);
+  canvas->flush();
+}
+
+}  // namespace sky