Remove worker support of Web SQL Database.

Source/modules/webdatabase/SQLTransactionBackendSync.cpp

Index: Source/modules/webdatabase/SQLTransactionBackendSync.cpp
diff --git a/Source/modules/webdatabase/SQLTransactionBackendSync.cpp b/Source/modules/webdatabase/SQLTransactionBackendSync.cpp
deleted file mode 100644
index 1f0d0008d28cbda98f41f167f2757b2486ef8beb..0000000000000000000000000000000000000000
--- a/Source/modules/webdatabase/SQLTransactionBackendSync.cpp
+++ /dev/null
@@ -1,261 +0,0 @@
-/*
- * Copyright (C) 2010 Google Inc. All rights reserved.
- * 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:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "config.h"
-#include "modules/webdatabase/SQLTransactionBackendSync.h"
-
-#include "bindings/core/v8/ExceptionState.h"
-#include "core/dom/ExceptionCode.h"
-#include "core/dom/ExecutionContext.h"
-#include "modules/webdatabase/sqlite/SQLValue.h"
-#include "modules/webdatabase/sqlite/SQLiteTransaction.h"
-#include "modules/webdatabase/DatabaseAuthorizer.h"
-#include "modules/webdatabase/DatabaseContext.h"
-#include "modules/webdatabase/DatabaseSync.h"
-#include "modules/webdatabase/SQLError.h"
-#include "modules/webdatabase/SQLResultSet.h"
-#include "modules/webdatabase/SQLStatementSync.h"
-#include "modules/webdatabase/SQLTransactionClient.h"
-#include "modules/webdatabase/SQLTransactionSync.h"
-#include "modules/webdatabase/SQLTransactionSyncCallback.h"
-#include "wtf/PassRefPtr.h"
-#include "wtf/RefPtr.h"
-
-namespace blink {
-
-SQLTransactionBackendSync::SQLTransactionBackendSync(DatabaseSync* db, PassOwnPtrWillBeRawPtr<SQLTransactionSyncCallback> callback, bool readOnly)
-    : m_database(db)
-    , m_callback(callback)
-    , m_readOnly(readOnly)
-    , m_hasVersionMismatch(false)
-    , m_modifiedDatabase(false)
-    , m_transactionClient(adoptPtr(new SQLTransactionClient()))
-{
-    ASSERT(m_database->executionContext()->isContextThread());
-}
-
-void SQLTransactionBackendSync::rollbackIfInProgress()
-{
-    ASSERT(!m_database->executionContext() || m_database->executionContext()->isContextThread());
-    if (m_sqliteTransaction && m_sqliteTransaction->inProgress())
-        rollback();
-}
-
-SQLTransactionBackendSync::~SQLTransactionBackendSync()
-{
-#if ENABLE(OILPAN)
-    ASSERT(!m_sqliteTransaction || !m_sqliteTransaction->inProgress());
-#else
-    rollbackIfInProgress();
-#endif
-}
-
-void SQLTransactionBackendSync::trace(Visitor* visitor)
-{
-    visitor->trace(m_database);
-    visitor->trace(m_callback);
-}
-
-PassRefPtrWillBeRawPtr<SQLResultSet> SQLTransactionBackendSync::executeSQL(const String& sqlStatement, const Vector<SQLValue>& arguments, ExceptionState& exceptionState)
-{
-    ASSERT(m_database->executionContext()->isContextThread());
-
-    m_database->setLastErrorMessage("");
-
-    if (!m_database->opened()) {
-        m_database->setLastErrorMessage("cannot executeSQL because the database is not open");
-        exceptionState.throwDOMException(UnknownError, SQLError::unknownErrorMessage);
-        return nullptr;
-    }
-
-    if (m_hasVersionMismatch) {
-        m_database->setLastErrorMessage("cannot executeSQL because there is a version mismatch");
-        exceptionState.throwDOMException(VersionError, SQLError::versionErrorMessage);
-        return nullptr;
-    }
-
-    if (sqlStatement.isEmpty())
-        return nullptr;
-
-    int permissions = DatabaseAuthorizer::ReadWriteMask;
-    if (!m_database->databaseContext()->allowDatabaseAccess())
-        permissions |= DatabaseAuthorizer::NoAccessMask;
-    else if (m_readOnly)
-        permissions |= DatabaseAuthorizer::ReadOnlyMask;
-
-    SQLStatementSync statement(sqlStatement, arguments, permissions);
-
-    m_database->resetAuthorizer();
-    bool retryStatement = true;
-    RefPtrWillBeRawPtr<SQLResultSet> resultSet;
-    while (retryStatement) {
-        retryStatement = false;
-        resultSet = statement.execute(m_database.get(), exceptionState);
-        if (!resultSet) {
-            if (m_sqliteTransaction->wasRolledBackBySqlite())
-                return nullptr;
-
-            if (exceptionState.code() == QuotaExceededError) {
-                if (m_transactionClient->didExceedQuota(database())) {
-                    exceptionState.clearException();
-                    retryStatement = true;
-                } else {
-                    m_database->setLastErrorMessage("there was not enough remaining storage space");
-                    return nullptr;
-                }
-            }
-        }
-    }
-
-    if (m_database->lastActionChangedDatabase())
-        m_modifiedDatabase = true;
-
-    return resultSet.release();
-}
-
-void SQLTransactionBackendSync::begin(ExceptionState& exceptionState)
-{
-    ASSERT(m_database->executionContext()->isContextThread());
-    if (!m_database->opened()) {
-        m_database->reportStartTransactionResult(1, SQLError::UNKNOWN_ERR, 0);
-        m_database->setLastErrorMessage("cannot begin transaction because the database is not open");
-        exceptionState.throwDOMException(UnknownError, SQLError::unknownErrorMessage);
-        return;
-    }
-
-    ASSERT(!m_database->sqliteDatabase().transactionInProgress());
-
-    // Set the maximum usage for this transaction if this transactions is not read-only.
-    if (!m_readOnly)
-        m_database->sqliteDatabase().setMaximumSize(m_database->maximumSize());
-
-    ASSERT(!m_sqliteTransaction);
-    m_sqliteTransaction = adoptPtr(new SQLiteTransaction(m_database->sqliteDatabase(), m_readOnly));
-
-    m_database->resetDeletes();
-    m_database->disableAuthorizer();
-    m_sqliteTransaction->begin();
-    m_database->enableAuthorizer();
-
-    // Check if begin() succeeded.
-    if (!m_sqliteTransaction->inProgress()) {
-        ASSERT(!m_database->sqliteDatabase().transactionInProgress());
-        m_database->reportStartTransactionResult(2, SQLError::DATABASE_ERR, m_database->sqliteDatabase().lastError());
-        m_database->setLastErrorMessage("unable to begin transaction",
-            m_database->sqliteDatabase().lastError(), m_database->sqliteDatabase().lastErrorMsg());
-        m_sqliteTransaction.clear();
-        exceptionState.throwDOMException(SQLDatabaseError, "Unable to begin transaction.");
-        return;
-    }
-
-    // Note: We intentionally retrieve the actual version even with an empty expected version.
-    // In multi-process browsers, we take this opportinutiy to update the cached value for
-    // the actual version. In single-process browsers, this is just a map lookup.
-    String actualVersion;
-    if (!m_database->getActualVersionForTransaction(actualVersion)) {
-        m_database->reportStartTransactionResult(3, SQLError::DATABASE_ERR, m_database->sqliteDatabase().lastError());
-        m_database->setLastErrorMessage("unable to read version",
-            m_database->sqliteDatabase().lastError(), m_database->sqliteDatabase().lastErrorMsg());
-        rollback();
-        exceptionState.throwDOMException(SQLDatabaseError, "Unable to read version.");
-        return;
-    }
-    m_hasVersionMismatch = !m_database->expectedVersion().isEmpty() && (m_database->expectedVersion() != actualVersion);
-    m_database->reportStartTransactionResult(0, -1, 0); // OK
-}
-
-void SQLTransactionBackendSync::execute(ExceptionState& exceptionState)
-{
-    ASSERT(m_database->executionContext()->isContextThread());
-    if (!m_database->opened() || (m_callback && !m_callback->handleEvent(SQLTransactionSync::from(this)))) {
-        if (m_database->lastErrorMessage().isEmpty())
-            m_database->setLastErrorMessage("failed to execute transaction callback");
-        m_callback.clear();
-        exceptionState.throwDOMException(UnknownError, SQLError::unknownErrorMessage);
-        return;
-    }
-
-    m_callback.clear();
-}
-
-void SQLTransactionBackendSync::commit(ExceptionState& exceptionState)
-{
-    ASSERT(m_database->executionContext()->isContextThread());
-    if (!m_database->opened()) {
-        m_database->reportCommitTransactionResult(1, SQLError::UNKNOWN_ERR, 0);
-        m_database->setLastErrorMessage("unable to commit transaction because the database is not open.");
-        exceptionState.throwDOMException(UnknownError, SQLError::unknownErrorMessage);
-        return;
-    }
-
-    ASSERT(m_sqliteTransaction);
-
-    m_database->disableAuthorizer();
-    m_sqliteTransaction->commit();
-    m_database->enableAuthorizer();
-
-    // If the commit failed, the transaction will still be marked as "in progress"
-    if (m_sqliteTransaction->inProgress()) {
-        m_database->reportCommitTransactionResult(2, SQLError::DATABASE_ERR, m_database->sqliteDatabase().lastError());
-        m_database->setLastErrorMessage("unable to commit transaction",
-            m_database->sqliteDatabase().lastError(), m_database->sqliteDatabase().lastErrorMsg());
-        exceptionState.throwDOMException(SQLDatabaseError, "Unable to commit transaction.");
-        return;
-    }
-
-    m_sqliteTransaction.clear();
-
-    // Vacuum the database if anything was deleted.
-    if (m_database->hadDeletes())
-        m_database->incrementalVacuumIfNeeded();
-
-    // The commit was successful. If the transaction modified this database, notify the delegates.
-    if (m_modifiedDatabase)
-        m_transactionClient->didCommitWriteTransaction(database());
-
-    m_database->reportCommitTransactionResult(0, -1, 0); // OK
-}
-
-// This can be called during GC. Do not allocate new on-heap objects.
-void SQLTransactionBackendSync::rollback()
-{
-    ASSERT(!m_database->executionContext() || m_database->executionContext()->isContextThread());
-    m_database->disableAuthorizer();
-    if (m_sqliteTransaction) {
-        m_sqliteTransaction->rollback();
-        m_sqliteTransaction.clear();
-    }
-    m_database->enableAuthorizer();
-
-    ASSERT(!m_database->sqliteDatabase().transactionInProgress());
-}
-
-} // namespace blink