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 42afd02d27362e63c239d73996cea1061cf80ad3..95bcddf61459471c6e9dd7a8556cd35dc5ecc6c6 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 {
 
@@ -63,16 +63,16 @@ public:
 private:
     explicit ScriptRunner(Document*);
 
-    void timerFired(Timer<ScriptRunner>*);
+    void executeScripts();
 
     void addPendingAsyncScript(ScriptLoader*);
 
     RawPtrWillBeMember<Document> m_document;
-    WillBeHeapVector<RawPtrWillBeMember<ScriptLoader> > m_scriptsToExecuteInOrder;
+    Deque<RawPtrWillBeMember<ScriptLoader>> m_scriptsToExecuteInOrder;

[Sami, 2015/02/10 18:40:01]

Should this be WillBeHeapDeque?

[alex clarke (OOO till 29th), 2015/02/18 18:28:20]

I suppose so.  I have to admit I'm not sure of the significance of the heap
allocation.

     // http://www.whatwg.org/specs/web-apps/current-work/#set-of-scripts-that-will-execute-as-soon-as-possible
-    WillBeHeapVector<RawPtrWillBeMember<ScriptLoader> > m_scriptsToExecuteSoon;
+    Deque<RawPtrWillBeMember<ScriptLoader>> m_scriptsToExecuteSoon;

[Sami, 2015/02/10 18:40:01]

Ditto.

[alex clarke (OOO till 29th), 2015/02/18 18:28:20]

Done.

     WillBeHeapHashSet<RawPtrWillBeMember<ScriptLoader> > m_pendingAsyncScripts;
-    Timer<ScriptRunner> m_timer;
+    CancellableTaskFactory m_executeScriptsTaskFactory;
 };
 
 }