Migrate ArcBitmap to use typemapping

components/arc/bitmap/bitmap_struct_traits.h

Index: components/arc/bitmap/bitmap_struct_traits.h
diff --git a/components/arc/bitmap/bitmap_struct_traits.h b/components/arc/bitmap/bitmap_struct_traits.h
new file mode 100644
index 0000000000000000000000000000000000000000..e4e61e3c1e44aa56edb68f8b5274a04ae1c18689
--- /dev/null
+++ b/components/arc/bitmap/bitmap_struct_traits.h
@@ -0,0 +1,30 @@
+// 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 COMPONENT_ARC_BITMAP_BITMAP_STRUCT_TRAITS_H_
+#define COMPONENT_ARC_BITMAP_BITMAP_STRUCT_TRAITS_H_
+
+#include "components/arc/common/bitmap.mojom.h"
+#include "third_party/skia/include/core/SkBitmap.h"
+
+namespace mojo {
+
+template <>
+struct StructTraits<arc::mojom::ArcBitmapDataView, SkBitmap> {
+  static const mojo::CArray<uint8_t> pixel_data(const SkBitmap& r) {
+    const SkImageInfo& info = r.info();
+    DCHECK_EQ(info.colorType(), kRGBA_8888_SkColorType);
+
+    return mojo::CArray<uint8_t>(
+        r.getSize(), r.getSize(), static_cast<uint8_t*>(r.getPixels()));
+  }
+  static uint32_t width(const SkBitmap& r) { return r.width(); }
+  static uint32_t height(const SkBitmap& r) { return r.height(); }
+
+  static bool Read(arc::mojom::ArcBitmapDataView data, SkBitmap* out);
+};
+
+}
+
+#endif  // COMPONENT_ARC_BITMAP_BITMAP_STRUCT_TRAITS_H_