This update for chromium fixes the following issues:

- Update to 84.0.4147.89 boo#1174189:
* Critical CVE-2020-6510: Heap buffer overflow in background fetch.
* High CVE-2020-6511: Side-channel information leakage in content security policy.
* High CVE-2020-6512: Type Confusion in V8.
* High CVE-2020-6513: Heap buffer overflow in PDFium.
* High CVE-2020-6514: Inappropriate implementation in WebRTC.
* High CVE-2020-6515: Use after free in tab strip.
* High CVE-2020-6516: Policy bypass in CORS.
* High CVE-2020-6517: Heap buffer overflow in history.
* Medium CVE-2020-6518: Use after free in developer tools.
* Medium CVE-2020-6519: Policy bypass in CSP.
* Medium CVE-2020-6520: Heap buffer overflow in Skia.
* Medium CVE-2020-6521: Side-channel information leakage in autofill.
* Medium CVE-2020-6522: Inappropriate implementation in external protocol handlers.
* Medium CVE-2020-6523: Out of bounds write in Skia.
* Medium CVE-2020-6524: Heap buffer overflow in WebAudio.
* Medium CVE-2020-6525: Heap buffer overflow in Skia.
* Low CVE-2020-6526: Inappropriate implementation in iframe sandbox.
* Low CVE-2020-6527: Insufficient policy enforcement in CSP.
* Low CVE-2020-6528: Incorrect security UI in basic auth.
* Low CVE-2020-6529: Inappropriate implementation in WebRTC.
* Low CVE-2020-6530: Out of bounds memory access in developer tools.
* Low CVE-2020-6531: Side-channel information leakage in scroll to text.
* Low CVE-2020-6533: Type Confusion in V8.
* Low CVE-2020-6534: Heap buffer overflow in WebRTC.
* Low CVE-2020-6535: Insufficient data validation in WebUI.
* Low CVE-2020-6536: Incorrect security UI in PWAs.
- Use bundled xcb-proto as we need to generate py2 bindings
- Try to fix non-wayland build for Leap builds