Added ImagePipe

mojo/services/gfx/images/cpp/image_pipe_consumer_delegate.h

+// Copyright 2016 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 MOJO_SERVICES_GFX_IMAGES_CPP_IMAGE_PIPE_CONSUMER_DELEGATE_H_
+#define MOJO_SERVICES_GFX_IMAGES_CPP_IMAGE_PIPE_CONSUMER_DELEGATE_H_
+
+#include "mojo/services/gfx/images/interfaces/image.mojom.h"
+
+namespace image_pipe {
+
+// Pure virtual class for platform dependent handling of
+// asynchronous calls on the consumer end of the image pipe.
+class ImagePipeConsumerDelegate {
+ public:
+  virtual ~ImagePipeConsumerDelegate() {}
+
+  virtual void AddImage(mojo::gfx::ImagePtr image, uint32_t id) = 0;
+  virtual void RemoveImage(uint32_t id) = 0;
+  virtual void PresentImage(uint32_t id) = 0;
+  virtual void HandleEndpointClosed() = 0;
+};
+}
+
+#endif  // MOJO_SERVICES_GFX_IMAGES_CPP_IMAGE_PIPE_CONSUMER_DELEGATE_H_