Move MediaDevices C++ and Mojo interfaces to blink/public/common and blink/public/mojom

The Mojo interface was defined in public/platform/ and the C++ interface was defined in

This is part of onion souping the mediastream module.

Bug: 704136
Change-Id: I06cb202e791e445779b533ecc4896d086638300e
Commit-Queue: Guido Urdaneta <>
Reviewed-by: Kinuko Yasuda <>
Reviewed-by: Kentaro Hara <>
Reviewed-by: Henrik Boström <>
Reviewed-by: Chris Palmer <>
Cr-Commit-Position: refs/heads/master@{#623218}
56 files changed