Use nullptr_t for RefPtr, PassRefPtr and RawPtr.

Source/modules/encryptedmedia/MediaKeys.cpp

 /*
  * Copyright (C) 2013 Apple 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
@@ skipping 31 matching lines @@
 DEFINE_GC_INFO(MediaKeys);
 
 PassRefPtrWillBeRawPtr<MediaKeys> MediaKeys::create(ExecutionContext* context, const String& keySystem, ExceptionState& exceptionState)
 {
     // From <http://dvcs.w3.org/hg/html-media/raw-file/default/encrypted-media/encrypted-media.html#dom-media-keys-constructor>:
     // The MediaKeys(keySystem) constructor must run the following steps:
 
     // 1. If keySystem is null or an empty string, throw an InvalidAccessError exception and abort these steps.
     if (keySystem.isEmpty()) {
         exceptionState.throwDOMException(InvalidAccessError, "The key system provided is invalid.");
-        return 0;
+        return nullptr;
     }
 
     // 2. If keySystem is not one of the user agent's supported Key Systems, throw a NotSupportedError and abort these steps.
     if (!ContentDecryptionModule::supportsKeySystem(keySystem)) {
         exceptionState.throwDOMException(NotSupportedError, "The '" + keySystem + "' key system is not supported.");
-        return 0;
+        return nullptr;
     }
 
     // 3. Let cdm be the content decryption module corresponding to keySystem.
     // 4. Load cdm if necessary.
     OwnPtr<ContentDecryptionModule> cdm = ContentDecryptionModule::create(keySystem);
     if (!cdm) {
         exceptionState.throwDOMException(NotSupportedError, "A content decryption module could not be loaded for the '" + keySystem + "' key system.");
-        return 0;
+        return nullptr;
     }
 
     // 5. Create a new MediaKeys object.
     // 5.1 Let the keySystem attribute be keySystem.
     // 6. Return the new object to the caller.
     return adoptRefWillBeNoop(new MediaKeys(context, keySystem, cdm.release()));
 }
 
 MediaKeys::MediaKeys(ExecutionContext* context, const String& keySystem, PassOwnPtr<ContentDecryptionModule> cdm)
     : ContextLifecycleObserver(context)
@@ skipping 14 matching lines @@
 PassRefPtrWillBeRawPtr<MediaKeySession> MediaKeys::createSession(ExecutionContext* context, const String& contentType, Uint8Array* initData, ExceptionState& exceptionState)
 {
     WTF_LOG(Media, "MediaKeys::createSession");
 
     // From <http://dvcs.w3.org/hg/html-media/raw-file/default/encrypted-media/encrypted-media.html#dom-createsession>:
     // The createSession(type, initData) method must run the following steps:
     // Note: The contents of initData are container-specific Initialization Data.
 
     if (contentType.isEmpty()) {
         exceptionState.throwDOMException(InvalidAccessError, "The contentType provided ('" + contentType + "') is empty.");
-        return 0;
+        return nullptr;
     }
 
     if (!initData || !initData->length()) {
         exceptionState.throwDOMException(InvalidAccessError, "The initData provided is null or empty.");
-        return 0;
+        return nullptr;
     }
 
     // 1. If type contains a MIME type that is not supported or is not supported by the keySystem,
     // throw a NOT_SUPPORTED_ERR exception and abort these steps.
     if (!m_cdm->supportsMIMEType(contentType)) {
         exceptionState.throwDOMException(NotSupportedError, "The type provided ('" + contentType + "') is unsupported.");
-        return 0;
+        return nullptr;
     }
 
     // 2. Create a new MediaKeySession object.
     RefPtrWillBeRawPtr<MediaKeySession> session = MediaKeySession::create(context, m_cdm.get(), m_weakFactory.createWeakPtr());
     // 2.1 Let the keySystem attribute be keySystem.
     ASSERT(!session->keySystem().isEmpty());
     // FIXME: 2.2 Let the state of the session be CREATED.
 
     // 3. Add the new object to an internal list of session objects (not needed).
 
@@ skipping 43 matching lines @@
 
 void MediaKeys::contextDestroyed()
 {
     ContextLifecycleObserver::contextDestroyed();
 
     // We don't need the CDM anymore.
     m_cdm.clear();
 }
 
 }