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This reverts commit 8e70db4d.

Reason for revert: Made a test flaky

Original change's description:
> [PM] Connect dedicated workers to their client frames in the graph.
> 
> Bug: 993029
> Change-Id: Iae20fa0ede4421782fc5fbf2851d21c83cfbf4c8
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2095452
> Commit-Queue: Patrick Monette <pmonette@chromium.org>
> Reviewed-by: Sigurður Ásgeirsson <siggi@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#753319}

TBR=pmonette@chromium.org,siggi@chromium.org

Change-Id: Ibb2d0ad5ed6e5d35be052e0324fcbf7954219070
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 993029, 1064772
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2122248Reviewed-by: Patrick Monette <pmonette@chromium.org>
Commit-Queue: Patrick Monette <pmonette@chromium.org>
Cr-Commit-Position: refs/heads/master@{#753622}