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Reland "[SendTabToSelf] Use new cache guid method to assert that local device is not listed as a target"

This is a reland of 38392a67

In this reland, the old logic remains unchanged as a fallback mechanism
in case the GUID-based detection fails (as the reports suggest).

Original change's description:
> [SendTabToSelf] Use new cache guid method to assert that local device is not listed as a target
>
> Bug: 966413
> Change-Id: I29fe887806b07a51d7490603aaf81415a5a349cb
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1721379
> Commit-Queue: Jeffrey Cohen <jeffreycohen@chromium.org>
> Reviewed-by: Mikel Astiz <mastiz@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#682341}

Bug: 966413
Change-Id: I85ae3c33c83f29f9a59cb8f3c2219e22e31a2bad
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1828817
Auto-Submit: Mikel Astiz <mastiz@chromium.org>
Reviewed-by: Ramya Nagarajan <ramyan@chromium.org>
Commit-Queue: Mikel Astiz <mastiz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#701073}