Proposed WebRTC Architecture on E10S

Introduction

The WebRTC architecture for desktop (Architecture) is based on a single process model where we can directly access platform resources from the WebRTC code. B2G, however, has a split process architecture (https://wiki.mozilla.org/B2G/Architecture) where the renderer/content process runs in a sandbox and has limited access to platform resources. Generally, it accesses them by doing IPC calls via https://developer.mozilla.org/en-US/docs/IPDL