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This reverts commit 6a008993.

Reason for revert: https://crbug.com/966766, more information at https://crbug.com/955936 beginning at comment 13

Original change's description:
> [Mac] Preserve symbolic link in the copy_bundle_data tool.
> 
> The copy_bundle_data tool is implemented in terms of pax for directories
> and ln hard links for files. The pax command does preserve symbolic
> links within the tree that is being copied. But with the way that pax is
> invoked by the tool, cd-ing into the source, if the source is itself
> a symbolic link to a directory, the tree will be logically copied rather
> than just as a symbolic link.
> 
> A similar issue exists with the non-directory symbolic link source case,
> where a hard link will be produced instead of a symbolic link.
> 
> Fix both of these cases by specifically testing if the source is a
> symbolic link and then re-creating it if so.
> 
> Bug: 955936
> Change-Id: I69cf96878e59b0b7b121ae46cba5bc1e81f261ae
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1626269
> Reviewed-by: Sylvain Defresne <sdefresne@chromium.org>
> Reviewed-by: Mark Mentovai <mark@chromium.org>
> Commit-Queue: Robert Sesek <rsesek@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#662575}

TBR=sdefresne@chromium.org,rsesek@chromium.org,mark@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 955936
Change-Id: Ia1489278b62d0cdb33ed8980bbd6a6bcab0bb199
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1628045Reviewed-by: Mark Mentovai <mark@chromium.org>
Reviewed-by: Sylvain Defresne <sdefresne@chromium.org>
Commit-Queue: Mark Mentovai <mark@chromium.org>
Cr-Commit-Position: refs/heads/master@{#663076}