Interract with Blink code

[fmallaba]

I want my application return custom app name when called navigator.appName from JS. I figured out that code responsible for navigator is located in blink/renderer/core/frame. I want to set up app name from browser process at runtime. As I understend I can send such request to render process, but I don't know how to interract with blink code to change it's behavior. Is there any API in renderer process to perform it?