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Sign upnavigationStart value is incorrect #17651
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bors-servo
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Jul 18, 2017
Set navigation start value according to navigation timing spec - [X] `./mach build -d` does not report any errors - [X] `./mach test-tidy` does not report any errors - [X] These changes fix #17651 <!-- Reviewable:start --> --- This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/17735) <!-- Reviewable:end -->
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We currently initialize the value that is returned by PerformanceTiming.navigationStart during ScriptThread::load. This means that it represents the time at which we have already received the initial response from the network. This disagrees with the definition of https://www.w3.org/TR/navigation-timing/#dom-performancetiming-navigationstart.