Update web-platform-tests docs

Update web-platform-tests docs

These updates address a number of issues that have come up in the past
week since the 2-way process was launched. See:
https://groups.google.com/a/chromium.org/d/msg/blink-dev/QIRcSgN9AK4/0JY58rBhCAAJ
https://groups.google.com/a/chromium.org/d/msg/platform-predictability/SBnz6Um7y2A/pDXVSOrpDwAJ

Drive-by: fix section links in other documentation.

BUG=657117
R=rbyers@chromium.org

Review-Url: https://codereview.chromium.org/2695963002
Cr-Commit-Position: refs/heads/master@{#450696}
Committed: https://chromium.googlesource.com/chromium/src/+/df2a863bb9ea5bf4e41d8d7d98e34566cd5f7bd2

[foolip, 2017-02-14 15:32:57]

The CQ bit was checked by foolip@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-02-14 15:33:16]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-02-14 15:42:45]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-02-14 15:42:46]

Dry run: This issue passed the CQ dry run.

[Rick Byers, 2017-02-15 14:56:37]

The CQ bit was checked by rbyers@chromium.org

[Rick Byers, 2017-02-15 14:56:37]

lgtm

[commit-bot: I haz the power, 2017-02-15 14:56:54]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-02-15 15:03:21]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1487170597411190, "parent_rev":
"5dbb827e3b41a97ec2d7105a0378c268a5d29fbe", "commit_rev":
"df2a863bb9ea5bf4e41d8d7d98e34566cd5f7bd2"}

[commit-bot: I haz the power, 2017-02-15 15:03:53]

Description was changed from

==========
Update web-platform-tests docs

These updates address a number of issues that have come up in the past
week since the 2-way process was launched. See:
https://groups.google.com/a/chromium.org/d/msg/blink-dev/QIRcSgN9AK4/0JY58rBh...
https://groups.google.com/a/chromium.org/d/msg/platform-predictability/SBnz6U...

Drive-by: fix section links in other documentation.

BUG=657117
R=rbyers@chromium.org
==========

to

==========
Update web-platform-tests docs

These updates address a number of issues that have come up in the past
week since the 2-way process was launched. See:
https://groups.google.com/a/chromium.org/d/msg/blink-dev/QIRcSgN9AK4/0JY58rBh...
https://groups.google.com/a/chromium.org/d/msg/platform-predictability/SBnz6U...

Drive-by: fix section links in other documentation.

BUG=657117
R=rbyers@chromium.org

Review-Url: https://codereview.chromium.org/2695963002
Cr-Commit-Position: refs/heads/master@{#450696}
Committed:
https://chromium.googlesource.com/chromium/src/+/df2a863bb9ea5bf4e41d8d7d98e3...
==========

[commit-bot: I haz the power, 2017-02-15 15:03:54]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/df2a863bb9ea5bf4e41d8d7d98e3...