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This reverts commit fd3a7398.

Reason for revert: Likely culprit of https://crbug.com/879513.

Original change's description:
> Rationalize call stacks targets in //components/metrics/BUILD.gn
> 
> Renames targets to better reflect what they provide. Removes the
> :metrics dep from the target for child processes to avoid including
> unnecessary browser-process-only code in those processes. Breaks the
> direct dependency of CallStackProfileBuilder on :metrics by introducing
> a receiver callback abstraction.
> 
> Bug: 878509
> Change-Id: I03a590f31be8c9641c9f375d8dbc0f8bc254b7d4
> Reviewed-on: https://chromium-review.googlesource.com/1195808
> Commit-Queue: Mike Wittman <wittman@chromium.org>
> Reviewed-by: Scott Violet <sky@chromium.org>
> Reviewed-by: Ilya Sherman <isherman@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#587726}

TBR=sky@chromium.org,wittman@chromium.org,isherman@chromium.org

Change-Id: I1ce64c7544b045a513980ff6deb6ddc804dee33f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 878509
Reviewed-on: https://chromium-review.googlesource.com/1199083Reviewed-by: Jan Wilken Dörrie <jdoerrie@chromium.org>
Commit-Queue: Jan Wilken Dörrie <jdoerrie@chromium.org>
Cr-Commit-Position: refs/heads/master@{#587978}