[SendTabToSelf] Only send entries targeted to this device to observers.

Bug: 946224
Change-Id: I17725ea898f427c7b1cecb9a54da16a0b2be5f71
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1570925
Commit-Queue: sebsg <sebsg@chromium.org>
Reviewed-by: Mikel Astiz <mastiz@chromium.org>
Reviewed-by: Peter Lee <pkl@chromium.org>
Cr-Commit-Position: refs/heads/master@{#653758}
13 files changed