Use the scheduling mechanism provided by the platform

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 6efa7521cbc94e6f4ce0a99ef717fb463908a44f..1599c61d12f98fc4647c59bed52ea148e674f698 100644
--- a/Source/core/html/parser/HTMLParserScheduler.cpp
+++ b/Source/core/html/parser/HTMLParserScheduler.cpp
@@ -29,7 +29,8 @@
 #include "core/dom/Document.h"
 #include "core/html/parser/HTMLDocumentParser.h"
 #include "core/frame/FrameView.h"
-#include "platform/scheduler/Scheduler.h"
+#include "public/platform/Platform.h"
+#include "public/platform/WebScheduler.h"
 #include "wtf/CurrentTime.h"
 
 namespace blink {
@@ -117,7 +118,7 @@ void HTMLParserScheduler::resume()
 
 inline bool HTMLParserScheduler::shouldYield(const SpeculationsPumpSession& session) const
 {
-    if (Scheduler::shared()->shouldYieldForHighPriorityWork())
+    if (Platform::current()->scheduler() && Platform::current()->scheduler()->shouldYieldForHighPriorityWork())
         return true;
 
     const double parserTimeLimit = 0.5;