Introduce PendingScript::startStreamingIfPossible()

third_party/WebKit/Source/core/dom/ScriptLoader.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights
  * reserved.
  * Copyright (C) 2008 Nikolas Zimmermann <zimmermann@kde.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 440 matching lines @@
 
   // 4th Clause:
   // - "If the script's type is "classic", and the element has a src attribute"
   // TODO(hiroshige): Check the script's type and implement "module" case.
   if (m_element->hasSourceAttribute()) {
     // "The element must be added to the set of scripts that will execute
     //  as soon as possible of the node document of the script element at the
     //  time the prepare a script algorithm started."
     m_pendingScript = PendingScript::create(m_element.get(), m_resource.get());
     m_asyncExecType = ScriptRunner::Async;
-    LocalFrame* frame = m_element->document().frame();
-    if (frame) {
-      ScriptState* scriptState = toScriptStateForMainWorld(frame);
-      if (scriptState)
-        ScriptStreamer::startStreaming(
-            m_pendingScript.get(), ScriptStreamer::Async, frame->settings(),
-            scriptState, frame->frameScheduler()->loadingTaskRunner());
-    }
+    m_pendingScript->startStreamingIfPossible(&m_element->document(),
+                                              ScriptStreamer::Async);
     // TODO(hiroshige): Here |contextDocument| is used as "node document"
     // while Step 14 uses |elementDocument| as "node document". Fix this.
     contextDocument->scriptRunner()->queueScriptForExecution(this,
                                                              m_asyncExecType);
     // Note that watchForLoad can immediately call pendingScriptFinished.
     m_pendingScript->watchForLoad(this);
     // The part "When the script is ready..." is implemented in
     // ScriptRunner::notifyScriptReady().
     // TODO(hiroshige): Annotate it.
 
@@ skipping 392 matching lines @@
   //     then abort these steps at this point. The script is not executed.
   return equalIgnoringCase(eventAttribute, "onload") ||
          equalIgnoringCase(eventAttribute, "onload()");
 }
 
 String ScriptLoader::scriptContent() const {
   return m_element->textFromChildren();
 }
 
 }  // namespace blink