core(trace-of-tab): throw error when TracingStartedInPage event is missing#4164
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patrickhulce merged 1 commit intoGoogleChrome:masterfrom Jan 3, 2018
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seems like a step in the right direction :) thanks!!
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@patrickhulce: Add the error message when TracingStartedInPage event is missing. Otherwise the error message would be: Cannot read property 'args' of undefined.
PTAL.