Plumb resize notifications around sky/shell

sky/shell/gpu_delegate.h

+// Copyright 2015 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.
+
+#ifndef SKY_SHELL_GPU_DELEGATE_H_
+#define SKY_SHELL_GPU_DELEGATE_H_
+
+#include "ui/gfx/native_widget_types.h"
+
+namespace sky {
+namespace shell {
+
+class GPUDelegate {
+ public:
+  virtual void OnAcceleratedWidgetAvailable(gfx::AcceleratedWidget widget) = 0;

[eseidel, 2015/02/05 05:57:28]

Is AcceleratedWidget a pointer?  Should this be const& or *?

[abarth-chromium, 2015/02/05 06:16:23]

It's a platform-specific typedef, but it boils down to a pointer on all
platforms.

+  virtual void OnDestroyed() = 0;
+
+ protected:
+  virtual ~GPUDelegate();
+};
+
+}  // namespace shell
+}  // namespace sky
+
+#endif  // SKY_SHELL_GPU_DELEGATE_H_