Oilpan: move WorkerGlobalScope to oilpan's heap.

Source/modules/encryptedmedia/HTMLMediaElementEncryptedMedia.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "modules/encryptedmedia/HTMLMediaElementEncryptedMedia.h"
 
 #include "RuntimeEnabledFeatures.h"
 #include "bindings/v8/ExceptionState.h"
 #include "core/dom/ExceptionCode.h"
@@ skipping 35 matching lines @@
 {
 }
 
 const char* HTMLMediaElementEncryptedMedia::supplementName()
 {
     return "HTMLMediaElementEncryptedMedia";
 }
 
 HTMLMediaElementEncryptedMedia& HTMLMediaElementEncryptedMedia::from(HTMLMediaElement& element)
 {
-    Supplement<HTMLMediaElement>* supplement = Supplement<HTMLMediaElement>::from(element, supplementName());
+    HTMLMediaElementEncryptedMedia* supplement = static_cast<HTMLMediaElementEncryptedMedia*>(Supplement<HTMLMediaElement>::from(element, supplementName()));
     if (!supplement) {
         supplement = new HTMLMediaElementEncryptedMedia();
         provideTo(element, supplementName(), adoptPtr(supplement));
     }
-    return *static_cast<HTMLMediaElementEncryptedMedia*>(supplement);
+    return *supplement;
 }
 
 bool HTMLMediaElementEncryptedMedia::setEmeMode(EmeMode emeMode, ExceptionState& exceptionState)
 {
     if (m_emeMode != EmeModeNotSelected && m_emeMode != emeMode) {
         exceptionState.throwDOMException(InvalidStateError, "Mixed use of EME prefixed and unprefixed API not allowed.");
         return false;
     }
     m_emeMode = emeMode;
     return true;
@@ skipping 272 matching lines @@
     thisElement.setMediaKeysInternal(element, 0);
 }
 
 blink::WebContentDecryptionModule* HTMLMediaElementEncryptedMedia::contentDecryptionModule(HTMLMediaElement& element)
 {
     HTMLMediaElementEncryptedMedia& thisElement = HTMLMediaElementEncryptedMedia::from(element);
     return thisElement.contentDecryptionModule();
 }
 
 } // namespace WebCore