Revert of Use bundled harfbuzz on Linux (patchset #13 id:280001 of https://codereview...

Revert of Use bundled harfbuzz on Linux (patchset #13 id:280001 of https://codereview.chromium.org/1197683002/)

Reason for revert:
This causes chrome to crash upon startup on ubuntu.

Original issue's description:
> Use bundled harfbuzz on Linux
>
> crbug.com/353127 changed to use the bundled harfbuzz for official builds
> on Linux, but not for non-official Linux builds due to link warnings and
> gfx_unittests crash on Trusty.
>
> This patch changes non-official Linux builds to use the bundled harfbuzz.
> Symbols from the bundled harfbuzz-ng are exported in non-official builds
> so that pangoft2 can see them. gfx_unittests crashes are no longer
> observed.
>
> BUG=462689, 353127
>
> Committed: https://crrev.com/94a9f1fd605ae10dc8628641b4ab5e0d44824376
> Cr-Commit-Position: refs/heads/master@{#336965}

TBR=behdad@chromium.org,behdad@google.com,drott@chromium.org,eae@chromium.org,ebraminio@gmail.com,kochi@chromium.org,kojii@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=462689, 353127

Review URL: https://codereview.chromium.org/1220033002

Cr-Commit-Position: refs/heads/master@{#337000}