Properly suspend HTMLDocumentParser

Source/core/html/parser/HTMLParserScheduler.cpp

Index: Source/core/html/parser/HTMLParserScheduler.cpp
diff --git a/Source/core/html/parser/HTMLParserScheduler.cpp b/Source/core/html/parser/HTMLParserScheduler.cpp
index bd384b72448ea6cbb5dfd571394b4bba8f16214e..68797fcc39e0e387c22f2ce6961b2d62e68c4eed 100644
--- a/Source/core/html/parser/HTMLParserScheduler.cpp
+++ b/Source/core/html/parser/HTMLParserScheduler.cpp
@@ -100,6 +100,7 @@ void HTMLParserScheduler::continueNextChunkTimerFired(Timer<HTMLParserScheduler>
 
 void HTMLParserScheduler::scheduleForResume()
 {
+    ASSERT(!m_isSuspendedWithActiveTimer);
     m_continueNextChunkTimer.startOneShot(0, FROM_HERE);
 }
 
@@ -155,4 +156,10 @@ bool HTMLParserScheduler::yieldIfNeeded(const SpeculationsPumpSession& session,
     return false;
 }
 
+void HTMLParserScheduler::forceResumeAfterYield()
+{
+    ASSERT(!m_continueNextChunkTimer.isActive());
+    m_isSuspendedWithActiveTimer = true;
+}
+
 }