Revert of Remove unnecessary uses of GarbageCollectedFinalized<>.

third_party/WebKit/Source/modules/encryptedmedia/MediaKeys.cpp

Index: third_party/WebKit/Source/modules/encryptedmedia/MediaKeys.cpp
diff --git a/third_party/WebKit/Source/modules/encryptedmedia/MediaKeys.cpp b/third_party/WebKit/Source/modules/encryptedmedia/MediaKeys.cpp
index 66afd1f2cf93984b0cbb45e392a32909a0d4182b..0620e002b75e816b6a19e79fd2e20012f9f04cdf 100644
--- a/third_party/WebKit/Source/modules/encryptedmedia/MediaKeys.cpp
+++ b/third_party/WebKit/Source/modules/encryptedmedia/MediaKeys.cpp
@@ -42,7 +42,7 @@
 namespace blink {
 
 // A class holding a pending action.
-class MediaKeys::PendingAction final : public GarbageCollected<MediaKeys::PendingAction> {
+class MediaKeys::PendingAction : public GarbageCollectedFinalized<MediaKeys::PendingAction> {
 public:
     const Persistent<ContentDecryptionModuleResult> result() const
     {
@@ -59,6 +59,10 @@
         ASSERT(result);
         ASSERT(serverCertificate);
         return new PendingAction(result, serverCertificate);
+    }
+
+    ~PendingAction()
+    {
     }
 
     DEFINE_INLINE_TRACE()