**Is your feature request related to a problem? Please describe.**
The clipboard module depends on the remote module on Linux.

**Describe the solution you'd like**
It should be implemented using dedicated IPCs that are properly validated to avoid security issues.

**Describe alternatives you've considered**
The app can call the clipboard APIs in the main process in response to app-level IPCs from the renderer.

**Additional context**
Follow-up from https://github.com/electron/electron/pull/13028

atom/common/api/atom_api_native_image.cc
float scale_factor = GetScaleFactorFromOptions(args);
  const SkBitmap bitmap =
      image_.AsImageSkia().GetRepresentation(scale_factor).GetBitmap();
  SkPixelRef* ref = bitmap.pixelRef();
  if (!ref)
    return node::Buffer::New(args->isolate(), 0).ToLocalChecked();
  return node::Buffer::Copy(args->isolate(),
                            reinterpret_cast<const char*>(ref->pixels()),
                            bitmap.computeByteSize())
      .ToLocalChecked();
}
v8::Local<v8::Value> NativeImage::ToJPEG(v8::Isolate* isolate, int quality) {