move image converter to gin (#19655)

shell/common/gin_converters/image_converter.h

@@ -0,0 +1,34 @@
+// Copyright (c) 2019 GitHub, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#ifndef SHELL_COMMON_GIN_CONVERTERS_IMAGE_CONVERTER_H_
+#define SHELL_COMMON_GIN_CONVERTERS_IMAGE_CONVERTER_H_
+
+#include "gin/converter.h"
+
+namespace gfx {
+class Image;
+class ImageSkia;
+}  // namespace gfx
+
+namespace gin {
+
+template <>
+struct Converter<gfx::ImageSkia> {
+  static bool FromV8(v8::Isolate* isolate,
+                     v8::Local<v8::Value> val,
+                     gfx::ImageSkia* out);
+};
+
+template <>
+struct Converter<gfx::Image> {
+  static bool FromV8(v8::Isolate* isolate,
+                     v8::Local<v8::Value> val,
+                     gfx::Image* out);
+  static v8::Local<v8::Value> ToV8(v8::Isolate* isolate, const gfx::Image& val);
+};
+
+}  // namespace gin
+
+#endif  // SHELL_COMMON_GIN_CONVERTERS_IMAGE_CONVERTER_H_