Platform/HTML5 parser tasks

This page outlines what needs to be done to 1) enable the HTML5 parser by default on mozilla-central and 2) ship a release with the HTML5 parser enabled by default.

The HTML5 parser has been suitable for dogfooding for over a year and in the past couple of months there have been virtually no new site compat bugs. Thus, the parser is already alpha quality from a user POV but not from a zero test suite regressions POV.

Things that need to be done before turning the HTML5 parser on by default

• Get reviews on hsivonen's pending patches. (various people)
• 536097 spinning in nsHtml5TreeBuilder::startTag()? (hsivonen)
  • This will either be simple or so rare that it's not an alpha blocker after all.
  • Need to reproduce this with debugger attached.
• The following are waiting for landings by others
  • 534458 test failure on css3.info selectors test with :checked{}
    • Waiting on lazy frame construction from Timothy Nikkel. (Seems reviewed and waiting landing.)
  • 543726 dom/tests/mochitest/ajax/offline/test_foreign.html fails
    • honzab has a fix. Waiting for review.
• Update the html5lib test suite snapshot used by mochitest. (jgriffin)
• Review the unreviewed parser core code. (sicking)
• Create a "slow tp" test suite for exercising speculative parsing. (bnewman) What if this suite reveals something bad?
• Security review.

Things that need to happen before shipping the HTML5 parser in a final Firefox release

• Fix "[HTML5]" bugs marked P2. (hsivonen)