Yield HTMLDocumentParser for high priority tasks in blink scheduler.

Source/core/html/parser/HTMLDocumentParser.cpp

 /*
  * Copyright (C) 2010 Google, Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 25 matching lines @@
 #include "core/html/parser/BackgroundHTMLParser.h"
 #include "core/html/parser/HTMLParserScheduler.h"
 #include "core/html/parser/HTMLParserThread.h"
 #include "core/html/parser/HTMLScriptRunner.h"
 #include "core/html/parser/HTMLTreeBuilder.h"
 #include "core/inspector/InspectorInstrumentation.h"
 #include "core/inspector/InspectorTraceEvents.h"
 #include "core/loader/DocumentLoader.h"
 #include "platform/SharedBuffer.h"
 #include "platform/TraceEvent.h"
+#include "platform/scheduler/Scheduler.h"
 #include "public/platform/WebThreadedDataReceiver.h"
 #include "wtf/Functional.h"
 
 namespace blink {
 
 using namespace HTMLNames;
 
 // This is a direct transcription of step 4 from:
 // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-end.html#fragment-case
 static HTMLTokenizer::State tokenizerStateForContextElement(Element* contextElement, bool reportErrors, const HTMLParserOptions& options)
@@ skipping 473 matching lines @@
 
     double startTime = currentTime();
 
     while (!m_speculations.isEmpty()) {
         processParsedChunkFromBackgroundParser(m_speculations.takeFirst());
 
         // Always check isStopped first as m_document may be null.
         if (isStopped() || isWaitingForScripts())
             break;
 
-        if (currentTime() - startTime > parserTimeLimit && !m_speculations.isEmpty()) {
+        if ((Scheduler::shared()->shouldYieldForHighPriorityWork() || currentTime() - startTime > parserTimeLimit) && !m_speculations.isEmpty()) {
             m_parserScheduler->scheduleForResume();
             break;
         }
     }
 
     TRACE_EVENT_END1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "ParseHTML", "endLine", lineNumber().zeroBasedInt());
     // FIXME(361045): remove InspectorInstrumentation calls once DevTools Timeline migrates to tracing.
     InspectorInstrumentation::didWriteHTML(cookie, lineNumber().zeroBasedInt());
     TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "UpdateCounters", "data", InspectorUpdateCountersEvent::data());
 }
@@ skipping 524 matching lines @@
 void HTMLDocumentParser::setDecoder(PassOwnPtr<TextResourceDecoder> decoder)
 {
     ASSERT(decoder);
     DecodedDataDocumentParser::setDecoder(decoder);
 
     if (m_haveBackgroundParser)
         HTMLParserThread::shared()->postTask(bind(&BackgroundHTMLParser::setDecoder, m_backgroundParser, takeDecoder()));
 }
 
 }