Use nullptr_t for RefPtr, PassRefPtr and RawPtr.

Source/modules/indexeddb/IDBRequestTest.cpp

 /*
  * Copyright (C) 2012 Google 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
@@ skipping 81 matching lines @@
 TEST_F(IDBRequestTest, EventsAfterStopping)
 {
     IDBTransaction* transaction = 0;
     RefPtr<IDBRequest> request = IDBRequest::create(executionContext(), IDBAny::createUndefined(), transaction);
     EXPECT_EQ(request->readyState(), "pending");
     executionContext()->stopActiveDOMObjects();
 
     // Ensure none of the following raise assertions in stopped state:
     request->onError(DOMError::create(AbortError, "Description goes here."));
     request->onSuccess(Vector<String>());
-    request->onSuccess(nullptr, IDBKey::createInvalid(), IDBKey::createInvalid(), 0);
+    request->onSuccess(nullptr, IDBKey::createInvalid(), IDBKey::createInvalid(), nullptr);
     request->onSuccess(IDBKey::createInvalid());
-    request->onSuccess(PassRefPtr<SharedBuffer>(0));
-    request->onSuccess(PassRefPtr<SharedBuffer>(0), IDBKey::createInvalid(), IDBKeyPath());
+    request->onSuccess(PassRefPtr<SharedBuffer>(nullptr));
+    request->onSuccess(PassRefPtr<SharedBuffer>(nullptr), IDBKey::createInvalid(), IDBKeyPath());
     request->onSuccess(0LL);
     request->onSuccess();
-    request->onSuccess(IDBKey::createInvalid(), IDBKey::createInvalid(), 0);
+    request->onSuccess(IDBKey::createInvalid(), IDBKey::createInvalid(), nullptr);
 }
 
 TEST_F(IDBRequestTest, AbortErrorAfterAbort)
 {
     IDBTransaction* transaction = 0;
     RefPtr<IDBRequest> request = IDBRequest::create(executionContext(), IDBAny::createUndefined(), transaction);
     EXPECT_EQ(request->readyState(), "pending");
 
     // Simulate the IDBTransaction having received onAbort from back end and aborting the request:
     request->abort();
@@ skipping 50 matching lines @@
         OwnPtr<MockWebIDBDatabase> backend = MockWebIDBDatabase::create();
         RefPtr<IDBOpenDBRequest> request = IDBOpenDBRequest::create(executionContext(), callbacks, transactionId, version);
         EXPECT_EQ(request->readyState(), "pending");
 
         executionContext()->stopActiveDOMObjects();
         request->onSuccess(backend.release(), metadata);
     }
 }
 
 } // namespace