Migrating MediaSession messages to mojo

third_party/WebKit/Source/platform/mojo/WebSizeStructTraits.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 WebSizeStructTraits_h
+#define WebSizeStructTraits_h
+
+#include "public/platform/WebSize.h"
+#include "ui/gfx/geometry/mojo/geometry.mojom-blink.h"
+
+namespace mojo {
+
+template <>
+struct StructTraits<gfx::mojom::blink::Size::DataView, ::blink::WebSize> {
+    static int width(const ::blink::WebSize& size) { return size.width; }
+    static int height(const ::blink::WebSize& size) { return size.height; }
+    static bool Read(gfx::mojom::blink::Size::DataView data, ::blink::WebSize* out) {
+        if (data.width() < 0 || data.height() < 0)
+            return false;
+        out->width = data.width();
+        out->height = data.height();
+        return true;
+    }
+};
+
+}
+
+#endif // WebSizeStructTraits_h