Revert r170531

Source/platform/TaskSynchronizer.h

Index: Source/platform/TaskSynchronizer.h
diff --git a/Source/platform/TaskSynchronizer.h b/Source/platform/TaskSynchronizer.h
deleted file mode 100644
index cc9efafd0f0eefc65fe3d6f71b745d4e5c1047c1..0000000000000000000000000000000000000000
--- a/Source/platform/TaskSynchronizer.h
+++ /dev/null
@@ -1,184 +0,0 @@
-/*
- * Copyright (C) 2007, 2008, 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
- *     documentation and/or other materials provided with the distribution.
- * 3.  Neither the name of Apple Computer, Inc. ("Apple") 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 APPLE AND ITS 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 APPLE OR ITS 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.
- */
-#ifndef DatabaseTask_h
-#define DatabaseTask_h
-
-#include "heap/Handle.h"
-#include "modules/webdatabase/DatabaseBackend.h"
-#include "modules/webdatabase/DatabaseBasicTypes.h"
-#include "modules/webdatabase/DatabaseError.h"
-#include "modules/webdatabase/SQLTransactionBackend.h"
-#include "platform/Task.h"
-#include "wtf/OwnPtr.h"
-#include "wtf/PassOwnPtr.h"
-#include "wtf/PassRefPtr.h"
-#include "wtf/RefPtr.h"
-#include "wtf/Threading.h"
-#include "wtf/Vector.h"
-#include "wtf/text/WTFString.h"
-
-namespace WebCore {
-
-// Can be used to wait until DatabaseTask is completed.
-// Has to be passed into DatabaseTask::create to be associated with the task.
-class DatabaseTaskSynchronizer {
-    WTF_MAKE_NONCOPYABLE(DatabaseTaskSynchronizer);
-public:
-    DatabaseTaskSynchronizer();
-
-    // Called from main thread to wait until task is completed.
-    void waitForTaskCompletion();
-
-    // Called by the task.
-    void taskCompleted();
-
-#ifndef NDEBUG
-    bool hasCheckedForTermination() const { return m_hasCheckedForTermination; }
-    void setHasCheckedForTermination() { m_hasCheckedForTermination = true; }
-#endif
-
-private:
-    bool m_taskCompleted;
-    Mutex m_synchronousMutex;
-    ThreadCondition m_synchronousCondition;
-#ifndef NDEBUG
-    bool m_hasCheckedForTermination;
-#endif
-};
-
-class DatabaseTask : public blink::WebThread::Task {
-    WTF_MAKE_NONCOPYABLE(DatabaseTask); WTF_MAKE_FAST_ALLOCATED;
-public:
-    virtual ~DatabaseTask();
-
-    virtual void run() OVERRIDE FINAL;
-
-    DatabaseBackend* database() const { return m_database.get(); }
-#ifndef NDEBUG
-    bool hasSynchronizer() const { return m_synchronizer; }
-    bool hasCheckedForTermination() const { return m_synchronizer->hasCheckedForTermination(); }
-#endif
-
-protected:
-    DatabaseTask(DatabaseBackend*, DatabaseTaskSynchronizer*);
-
-private:
-    virtual void doPerformTask() = 0;
-    virtual void taskCancelled() { }
-
-    RefPtrWillBeCrossThreadPersistent<DatabaseBackend> m_database;
-    DatabaseTaskSynchronizer* m_synchronizer;
-
-#if !LOG_DISABLED
-    virtual const char* debugTaskName() const = 0;
-    bool m_complete;
-#endif
-};
-
-class DatabaseBackend::DatabaseOpenTask FINAL : public DatabaseTask {
-public:
-    static PassOwnPtr<DatabaseOpenTask> create(DatabaseBackend* db, bool setVersionInNewDatabase, DatabaseTaskSynchronizer* synchronizer, DatabaseError& error, String& errorMessage, bool& success)
-    {
-        return adoptPtr(new DatabaseOpenTask(db, setVersionInNewDatabase, synchronizer, error, errorMessage, success));
-    }
-
-private:
-    DatabaseOpenTask(DatabaseBackend*, bool setVersionInNewDatabase, DatabaseTaskSynchronizer*, DatabaseError&, String& errorMessage, bool& success);
-
-    virtual void doPerformTask() OVERRIDE;
-#if !LOG_DISABLED
-    virtual const char* debugTaskName() const OVERRIDE;
-#endif
-
-    bool m_setVersionInNewDatabase;
-    DatabaseError& m_error;
-    String& m_errorMessage;
-    bool& m_success;
-};
-
-class DatabaseBackend::DatabaseCloseTask FINAL : public DatabaseTask {
-public:
-    static PassOwnPtr<DatabaseCloseTask> create(DatabaseBackend* db, DatabaseTaskSynchronizer* synchronizer)
-    {
-        return adoptPtr(new DatabaseCloseTask(db, synchronizer));
-    }
-
-private:
-    DatabaseCloseTask(DatabaseBackend*, DatabaseTaskSynchronizer*);
-
-    virtual void doPerformTask() OVERRIDE;
-#if !LOG_DISABLED
-    virtual const char* debugTaskName() const OVERRIDE;
-#endif
-};
-
-class DatabaseBackend::DatabaseTransactionTask FINAL : public DatabaseTask {
-public:
-    virtual ~DatabaseTransactionTask();
-
-    // Transaction task is never synchronous, so no 'synchronizer' parameter.
-    static PassOwnPtr<DatabaseTransactionTask> create(PassRefPtrWillBeRawPtr<SQLTransactionBackend> transaction)
-    {
-        return adoptPtr(new DatabaseTransactionTask(transaction));
-    }
-
-    SQLTransactionBackend* transaction() const { return m_transaction.get(); }
-
-private:
-    explicit DatabaseTransactionTask(PassRefPtrWillBeRawPtr<SQLTransactionBackend>);
-
-    virtual void doPerformTask() OVERRIDE;
-    virtual void taskCancelled() OVERRIDE;
-#if !LOG_DISABLED
-    virtual const char* debugTaskName() const OVERRIDE;
-#endif
-
-    RefPtrWillBeCrossThreadPersistent<SQLTransactionBackend> m_transaction;
-};
-
-class DatabaseBackend::DatabaseTableNamesTask FINAL : public DatabaseTask {
-public:
-    static PassOwnPtr<DatabaseTableNamesTask> create(DatabaseBackend* db, DatabaseTaskSynchronizer* synchronizer, Vector<String>& names)
-    {
-        return adoptPtr(new DatabaseTableNamesTask(db, synchronizer, names));
-    }
-
-private:
-    DatabaseTableNamesTask(DatabaseBackend*, DatabaseTaskSynchronizer*, Vector<String>& names);
-
-    virtual void doPerformTask() OVERRIDE;
-#if !LOG_DISABLED
-    virtual const char* debugTaskName() const OVERRIDE;
-#endif
-
-    Vector<String>& m_tableNames;
-};
-
-} // namespace WebCore
-
-#endif // DatabaseTask_h