IndexedDB: Replace 0 with nullptr where appropriate

Source/modules/indexeddb/IDBCursor.cpp

 /*
  * Copyright (C) 2010 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 71 matching lines @@
     visitor->trace(m_key);
     visitor->trace(m_primaryKey);
 }
 
 IDBRequest* IDBCursor::update(ScriptState* scriptState, const ScriptValue& value, ExceptionState& exceptionState)
 {
     IDB_TRACE("IDBCursor::update");
 
     if (!m_gotValue) {
         exceptionState.throwDOMException(InvalidStateError, IDBDatabase::noValueErrorMessage);
-        return 0;
+        return nullptr;
     }
     if (isKeyCursor()) {
         exceptionState.throwDOMException(InvalidStateError, IDBDatabase::isKeyCursorErrorMessage);
-        return 0;
+        return nullptr;
     }
     if (isDeleted()) {
         exceptionState.throwDOMException(InvalidStateError, IDBDatabase::sourceDeletedErrorMessage);
-        return 0;
+        return nullptr;
     }
     if (m_transaction->isFinished() || m_transaction->isFinishing()) {
         exceptionState.throwDOMException(TransactionInactiveError, IDBDatabase::transactionFinishedErrorMessage);
-        return 0;
+        return nullptr;
     }
     if (!m_transaction->isActive()) {
         exceptionState.throwDOMException(TransactionInactiveError, IDBDatabase::transactionInactiveErrorMessage);
-        return 0;
+        return nullptr;
     }
     if (m_transaction->isReadOnly()) {
         exceptionState.throwDOMException(ReadOnlyError, "The record may not be updated inside a read-only transaction.");
-        return 0;
+        return nullptr;
     }
 
     IDBObjectStore* objectStore = effectiveObjectStore();
     return objectStore->put(scriptState, WebIDBPutModeCursorUpdate, IDBAny::create(this), value, m_primaryKey, exceptionState);
 }
 
 void IDBCursor::advance(unsigned count, ExceptionState& exceptionState)
 {
     IDB_TRACE("IDBCursor::advance");
     if (!count) {
@@ skipping 26 matching lines @@
 void IDBCursor::continueFunction(ScriptState* scriptState, const ScriptValue& keyValue, ExceptionState& exceptionState)
 {
     IDB_TRACE("IDBCursor::continue");
     IDBKey* key = keyValue.isUndefined() || keyValue.isNull() ? nullptr : ScriptValue::to<IDBKey*>(scriptState->isolate(), keyValue, exceptionState);
     if (exceptionState.hadException())
         return;
     if (key && !key->isValid()) {
         exceptionState.throwDOMException(DataError, IDBDatabase::notValidKeyErrorMessage);
         return;
     }
-    continueFunction(key, 0, exceptionState);
+    continueFunction(key, nullptr, exceptionState);
 }
 
 void IDBCursor::continuePrimaryKey(ScriptState* scriptState, const ScriptValue& keyValue, const ScriptValue& primaryKeyValue, ExceptionState& exceptionState)
 {
     IDB_TRACE("IDBCursor::continuePrimaryKey");
     if (m_source->type() != IDBAny::IDBIndexType) {
         exceptionState.throwDOMException(InvalidAccessError, "The cursor's source is not an index.");
         return;
     }
 
@@ skipping 64 matching lines @@
     m_request->setPendingCursor(this);
     m_gotValue = false;
     m_backend->continueFunction(key, primaryKey, WebIDBCallbacksImpl::create(m_request).leakPtr());
 }
 
 IDBRequest* IDBCursor::deleteFunction(ScriptState* scriptState, ExceptionState& exceptionState)
 {
     IDB_TRACE("IDBCursor::delete");
     if (m_transaction->isFinished() || m_transaction->isFinishing()) {
         exceptionState.throwDOMException(TransactionInactiveError, IDBDatabase::transactionFinishedErrorMessage);
-        return 0;
+        return nullptr;
     }
     if (!m_transaction->isActive()) {
         exceptionState.throwDOMException(TransactionInactiveError, IDBDatabase::transactionInactiveErrorMessage);
-        return 0;
+        return nullptr;
     }
     if (m_transaction->isReadOnly()) {
         exceptionState.throwDOMException(ReadOnlyError, "The record may not be deleted inside a read-only transaction.");
-        return 0;
+        return nullptr;
     }
 
     if (!m_gotValue) {
         exceptionState.throwDOMException(InvalidStateError, IDBDatabase::noValueErrorMessage);
-        return 0;
+        return nullptr;
     }
     if (isKeyCursor()) {
         exceptionState.throwDOMException(InvalidStateError, IDBDatabase::isKeyCursorErrorMessage);
-        return 0;
+        return nullptr;
     }
     if (isDeleted()) {
         exceptionState.throwDOMException(InvalidStateError, IDBDatabase::sourceDeletedErrorMessage);
-        return 0;
+        return nullptr;
     }
     if (!m_transaction->backendDB()) {
         exceptionState.throwDOMException(InvalidStateError, IDBDatabase::databaseClosedErrorMessage);
-        return 0;
+        return nullptr;
     }
 
     IDBKeyRange* keyRange = IDBKeyRange::only(m_primaryKey, exceptionState);
     ASSERT(!exceptionState.hadException());
 
     IDBRequest* request = IDBRequest::create(scriptState, IDBAny::create(this), m_transaction.get());
     m_transaction->backendDB()->deleteRange(m_transaction->id(), effectiveObjectStore()->id(), keyRange, WebIDBCallbacksImpl::create(request).leakPtr());
     return request;
 }
 
@@ skipping 109 matching lines @@
     case WebIDBCursorDirectionPrevNoDuplicate:
         return IndexedDBNames::prevunique;
 
     default:
         ASSERT_NOT_REACHED();
         return IndexedDBNames::next;
     }
 }
 
 } // namespace blink