Restore AutodrainedPoolMac.mm, use it in blink/mac.

Source/WTF/wtf/AutodrainedPoolMac.mm

 /*
- * Copyright (C) 2010 Google Inc. All rights reserved.
+ * Copyright (C) 2007, 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 WTF_Complex_h
-#define WTF_Complex_h
+#import "config.h"
+#import "AutodrainedPool.h"
 
-#include <complex>
-#include <wtf/MathExtras.h>
+#import <Foundation/Foundation.h>
 
 namespace WTF {
 
-typedef std::complex<double> Complex;
+AutodrainedPool::AutodrainedPool(int iterationLimit)
+    : m_iterationLimit(iterationLimit)
+    , m_iterationCount(0)
+    , m_pool([[NSAutoreleasePool alloc] init])
+{
+}
 
-inline Complex complexFromMagnitudePhase(double magnitude, double phase)
+AutodrainedPool::~AutodrainedPool()
 {
-    return Complex(magnitude * cos(phase), magnitude * sin(phase));
+    [m_pool drain];
+}
+
+void AutodrainedPool::cycle()
+{
+    if (++m_iterationCount == m_iterationLimit) {
+        [m_pool drain];
+        m_pool = [[NSAutoreleasePool alloc] init];
+        m_iterationCount = 0;
+    }
 }
 
 } // namespace WTF
-
-using WTF::Complex;
-using WTF::complexFromMagnitudePhase;
-
-#endif // WTF_Complex_h