Backed out changeset a2d8eae8d006 (bug 1749522) for causing reftest failures in tests/reftest/bug1749522-1. CLOSED TREE

parser/html/nsHtml5StreamParser.cpp

@@ -1869,13 +1869,6 @@ void nsHtml5StreamParser::DiscardMetaSpeculation() {
   mTokenizer->setLineNumber(1);
   mLastWasCR = false;
 
-  if (mMode == PLAIN_TEXT || mMode == VIEW_SOURCE_PLAIN) {
-    // resetToDataState() above logically rewinds to the state before
-    // the plain text start, so we need to start plain text again to
-    // put the tokenizer into the plain text state.
-    mTokenizer->StartPlainText();
-  }
-
   mFirstBuffer = mLastBuffer;
   mFirstBuffer->setStart(0);
   mFirstBuffer->setEnd(0);