[UserTimingL3] Add 'duration' member of PerformanceMeasureOptions. #18438
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In the User Timing L3 spec
(https://w3c.github.io/user-timing/#performancemeasureoptions-dictionary),
PerformanceMeasureOptions dictionaries can have a 'duration' member.
This gives users better control over what timespan gets covered when
calling
performance.measure()
.WPT coverage is also extended to check that user agents support the
'duration' member and raise errors as specified.
Bug: 953848
Change-Id: Ibd2a9536b1688e19bebfd559dcf9f3437b7d89e7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1753741
Commit-Queue: Tom McKee <tommckee@chromium.org>
Reviewed-by: Nicolás Peña Moreno <npm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#687391}