Oilpan: have PendingScripts trace their script elements.

Source/core/html/parser/HTMLScriptRunner.h

 /*
  * Copyright (C) 2010 Google, Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef HTMLScriptRunner_h
 #define HTMLScriptRunner_h
 
 #include "core/dom/PendingScript.h"
+#include "core/fetch/ResourceClient.h"
+#include "platform/heap/Handle.h"
 #include "wtf/Deque.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/text/TextPosition.h"
 
 namespace WebCore {
 
 class Resource;
 class ScriptResource;
 class Document;
 class Element;
 class LocalFrame;
 class HTMLScriptRunnerHost;
 class ScriptSourceCode;
 
-class HTMLScriptRunner {
-    WTF_MAKE_NONCOPYABLE(HTMLScriptRunner); WTF_MAKE_FAST_ALLOCATED;
+class HTMLScriptRunner FINAL : public NoBaseWillBeGarbageCollectedFinalized<HTMLScriptRunner>, private ResourceClient {
+    WTF_MAKE_NONCOPYABLE(HTMLScriptRunner); WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
 public:
-    static PassOwnPtr<HTMLScriptRunner> create(Document* document, HTMLScriptRunnerHost* host)
+    static PassOwnPtrWillBeRawPtr<HTMLScriptRunner> create(Document* document, HTMLScriptRunnerHost* host)
     {
-        return adoptPtr(new HTMLScriptRunner(document, host));
+        return adoptPtrWillBeNoop(new HTMLScriptRunner(document, host));
     }
     ~HTMLScriptRunner();
 
     void detach();
 
     // Processes the passed in script and any pending scripts if possible.
-    void execute(PassRefPtr<Element> scriptToProcess, const TextPosition& scriptStartPosition);
+    void execute(PassRefPtrWillBeRawPtr<Element> scriptToProcess, const TextPosition& scriptStartPosition);
 
     void executeScriptsWaitingForLoad(Resource*);
     bool hasScriptsWaitingForResources() const { return m_hasScriptsWaitingForResources; }
     void executeScriptsWaitingForResources();
     bool executeScriptsWaitingForParsing();
 
     bool hasParserBlockingScript() const;
     bool isExecutingScript() const { return !!m_scriptNestingLevel; }
 
+    // ResourceClient
+    virtual void notifyFinished(Resource*) OVERRIDE;
+
+    void trace(Visitor*);
+
 private:
     HTMLScriptRunner(Document*, HTMLScriptRunnerHost*);
 
     LocalFrame* frame() const;
 
     enum PendingScriptType {
         PendingScriptBlockingParser,
         PendingScriptDeferred
     };
 
     void executeParsingBlockingScript();
     void executePendingScriptAndDispatchEvent(PendingScript&, PendingScriptType);
     void executeParsingBlockingScripts();
 
     void requestParsingBlockingScript(Element*);
     void requestDeferredScript(Element*);
     bool requestPendingScript(PendingScript&, Element*) const;
 
     void runScript(Element*, const TextPosition& scriptStartPosition);
 
     // Helpers for dealing with HTMLScriptRunnerHost
     void watchForLoad(PendingScript&);
     void stopWatchingForLoad(PendingScript&);
     bool isPendingScriptReady(const PendingScript&);
     ScriptSourceCode sourceFromPendingScript(const PendingScript&, bool& errorOccurred) const;
 
-    Document* m_document;
-    HTMLScriptRunnerHost* m_host;
+    RawPtrWillBeMember<Document> m_document;
+    RawPtrWillBeMember<HTMLScriptRunnerHost> m_host;
     PendingScript m_parserBlockingScript;
     Deque<PendingScript> m_scriptsToExecuteAfterParsing; // http://www.whatwg.org/specs/web-apps/current-work/#list-of-scripts-that-will-execute-when-the-document-has-finished-parsing
     unsigned m_scriptNestingLevel;
 
     // We only want stylesheet loads to trigger script execution if script
     // execution is currently stopped due to stylesheet loads, otherwise we'd
     // cause nested script execution when parsing <style> tags since </style>
     // tags can cause Document to call executeScriptsWaitingForResources.
     bool m_hasScriptsWaitingForResources;
 };
 
 }
 
 #endif