Properly suspend HTMLDocumentParser

Source/core/html/parser/HTMLParserScheduler.h

Index: Source/core/html/parser/HTMLParserScheduler.h
diff --git a/Source/core/html/parser/HTMLParserScheduler.h b/Source/core/html/parser/HTMLParserScheduler.h
index cd8cdb4d5cc5158727a1e8b7efbc37e436d98ba2..d8d73fe7408a34e48f804e3584ca55a12c477dd3 100644
--- a/Source/core/html/parser/HTMLParserScheduler.h
+++ b/Source/core/html/parser/HTMLParserScheduler.h
@@ -81,6 +81,15 @@ public:
     void scheduleForResume();
     bool yieldIfNeeded(const SpeculationsPumpSession&, bool startingScript);
 
+    /**
+     * Can only be called if this scheduler is suspended. If this is called,
+     * then after the scheduler is resumed by calling resume(), this call
+     * ensures that HTMLDocumentParser::resumeAfterYield will be called. Used to
+     * signal this scheduler that the background html parser sent chunks to
+     * HTMLDocumentParser while it was suspended.
+     */
+    void forceResumeAfterYield();
+
     void suspend();
     void resume();