Merge TaskSynchronizer into WaitableEvent.

third_party/WebKit/Source/platform/TaskSynchronizer.cpp

Index: third_party/WebKit/Source/platform/TaskSynchronizer.cpp
diff --git a/third_party/WebKit/Source/platform/TaskSynchronizer.cpp b/third_party/WebKit/Source/platform/TaskSynchronizer.cpp
deleted file mode 100644
index 3e019dc8fe2407ad2d02c975d947805a7590914a..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/platform/TaskSynchronizer.cpp
+++ /dev/null
@@ -1,70 +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.
- */
-
-#include "platform/TaskSynchronizer.h"
-
-#include "platform/heap/SafePoint.h"
-#include "platform/heap/ThreadState.h"
-
-namespace blink {
-
-TaskSynchronizer::TaskSynchronizer()
-    : m_taskCompleted(false)
-{
-}
-
-void TaskSynchronizer::waitForTaskCompletion()
-{
-    if (ThreadState::current()) {
-        // Prevent the deadlock between park request by other threads and blocking
-        // by m_synchronousCondition.
-        SafePointScope scope(BlinkGC::HeapPointersOnStack);
-        waitForTaskCompletionInternal();
-    } else {
-        // If this thread is already detached, we no longer need to enter a safe point scope.
-        waitForTaskCompletionInternal();
-    }
-}
-
-void TaskSynchronizer::waitForTaskCompletionInternal()
-{
-    m_synchronousMutex.lock();
-    while (!m_taskCompleted)
-        m_synchronousCondition.wait(m_synchronousMutex);
-    m_synchronousMutex.unlock();
-}
-
-void TaskSynchronizer::taskCompleted()
-{
-    m_synchronousMutex.lock();
-    m_taskCompleted = true;
-    m_synchronousCondition.signal();
-    m_synchronousMutex.unlock();
-}
-
-} // namespace blink