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This change disconnects caBLEv2 on the desktop and mobile so that
further changes can be made incrementally. Otherwise, in order to
keep everything working, large changes cannot be broken up.

BUG=1002262

Change-Id: If2e4c5c561fd2b57cd8f70dbe33c769109ca9c1e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2332375
Commit-Queue: Martin Kreichgauer <martinkr@google.com>
Reviewed-by: Martin Kreichgauer <martinkr@google.com>
Auto-Submit: Adam Langley <agl@chromium.org>
Cr-Commit-Position: refs/heads/master@{#795534}