Reland "Async Clipboard Tests: Use quotes as per style guide."

This reverts commit 4b6a562c7bde8700fe66eda5d3f65b3e48750ef2.

patchset 1 contains the original CL, and patchset 2 contains the fix for the issue.

Original change's description:
> Revert "Async Clipboard Tests: Use quotes as per style guide."
>
> This reverts commit db06615901b73ccd41abb8e15954061c61bec3fd.
>
> Reason for revert: broke external/wpt/clipboard-apis/async-interfaces.https.html
>
>
> Original change's description:
> > Async Clipboard Tests: Use quotes as per style guide.
> >
> > Use ' (single-quotes) for js string quotes, and " (double-quotes) for HTML
> > string quotes. This was inconsistent before this CL, so make it more
> > consistent as per the Google JS/HTML style guides.
> >
> > Reference:
> > - https://google.github.io/styleguide/jsguide.html#features-strings-use-single-quotes
> > - https://google.github.io/styleguide/htmlcssguide.html#HTML_Quotation_Marks
> >
> > Change-Id: I794b278b2020a329f6e3ea0deeb6136ae04122c4
> > Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1531710
> > Reviewed-by: Victor Costan <pwnall@chromium.org>
> > Commit-Queue: Darwin Huang <huangdarwin@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#642594}
>
> TBR=pwnall@chromium.org,huangdarwin@chromium.org
>
> Change-Id: I85f903d44f39c1b448342183a85d2f9934cecf9d
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1533098
> Reviewed-by: Carlos Knippschild <carlosk@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#642728}

TBR=carlosk@chromium.org,pwnall@chromium.org,huangdarwin@chromium.org

Change-Id: Ia50561a9c648e1aa0cd520631b84c3e69a800903
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1533207
Commit-Queue: Darwin Huang <huangdarwin@chromium.org>
Reviewed-by: Victor Costan <pwnall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#642752}
24 files changed