Oilpan: prevent player from accessing its media element during finalization

Source/modules/encryptedmedia/HTMLMediaElementEncryptedMedia.cpp

Index: Source/modules/encryptedmedia/HTMLMediaElementEncryptedMedia.cpp
diff --git a/Source/modules/encryptedmedia/HTMLMediaElementEncryptedMedia.cpp b/Source/modules/encryptedmedia/HTMLMediaElementEncryptedMedia.cpp
index 3f7a6a56a071e9ff6b9c860c236499c068047207..4f1c4d55f5bf5c14a71b73071632407fe7b4e0b7 100644
--- a/Source/modules/encryptedmedia/HTMLMediaElementEncryptedMedia.cpp
+++ b/Source/modules/encryptedmedia/HTMLMediaElementEncryptedMedia.cpp
@@ -338,6 +338,12 @@ void HTMLMediaElementEncryptedMedia::keyNeeded(HTMLMediaElement& element, const
 
 void HTMLMediaElementEncryptedMedia::playerDestroyed(HTMLMediaElement& element)
 {
+#if ENABLE(OILPAN)
+    // FIXME: Oilpan: remove this once the media player is on the heap. crbug.com/378229
+    if (element.isFinalizing())
+        return;
+#endif
+
     HTMLMediaElementEncryptedMedia& thisElement = HTMLMediaElementEncryptedMedia::from(element);
     thisElement.setMediaKeysInternal(element, 0);
 }