Teach ScriptRunner how to yield and post on loading task queue

Source/core/dom/ScriptRunner.h

Index: Source/core/dom/ScriptRunner.h
diff --git a/Source/core/dom/ScriptRunner.h b/Source/core/dom/ScriptRunner.h
index a6e745afa5ed4aef4feb18b894807ef212e7f66b..d11edbc3130644d7995a8c3e9c019bb2eaad5a9f 100644
--- a/Source/core/dom/ScriptRunner.h
+++ b/Source/core/dom/ScriptRunner.h
@@ -27,12 +27,12 @@
 #define ScriptRunner_h
 
 #include "core/fetch/ResourcePtr.h"
-#include "platform/Timer.h"
 #include "platform/heap/Handle.h"
+#include "platform/scheduler/CancellableTaskFactory.h"
+#include "wtf/Deque.h"
 #include "wtf/HashMap.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/PassOwnPtr.h"
-#include "wtf/Vector.h"
 
 namespace blink {
 
@@ -63,18 +63,22 @@ public:
 private:
     explicit ScriptRunner(Document*);
 
-    void timerFired(Timer<ScriptRunner>*);
+    void executeScripts();
 
     void addPendingAsyncScript(ScriptLoader*);
 
     void movePendingAsyncScript(ScriptRunner*, ScriptLoader*);
 
+    bool yieldForHighPriorityWork();
+
+    void postTaskIfOneIsNotAlreadyInFlight();
+
     RawPtrWillBeMember<Document> m_document;
-    WillBeHeapVector<RawPtrWillBeMember<ScriptLoader> > m_scriptsToExecuteInOrder;
+    WillBeHeapDeque<RawPtrWillBeMember<ScriptLoader>> m_scriptsToExecuteInOrder;
     // http://www.whatwg.org/specs/web-apps/current-work/#set-of-scripts-that-will-execute-as-soon-as-possible
-    WillBeHeapVector<RawPtrWillBeMember<ScriptLoader> > m_scriptsToExecuteSoon;
+    WillBeHeapDeque<RawPtrWillBeMember<ScriptLoader>> m_scriptsToExecuteSoon;
     WillBeHeapHashSet<RawPtrWillBeMember<ScriptLoader> > m_pendingAsyncScripts;
-    Timer<ScriptRunner> m_timer;
+    CancellableTaskFactory m_executeScriptsTaskFactory;
 };
 
 }