diff -r 000000000000 -r 6474c204b198 ipc/chromium/src/base/scoped_nsautorelease_pool.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ipc/chromium/src/base/scoped_nsautorelease_pool.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,52 @@
+// Copyright (c) 2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_SCOPED_NSAUTORELEASE_POOL_H_
+#define BASE_SCOPED_NSAUTORELEASE_POOL_H_
+
+#include "base/basictypes.h"
+
+#if defined(OS_MACOSX)
+#if defined(__OBJC__)
+@class NSAutoreleasePool;
+#else  // __OBJC__
+class NSAutoreleasePool;
+#endif  // __OBJC__
+#endif  // OS_MACOSX
+
+namespace base {
+
+// On the Mac, ScopedNSAutoreleasePool allocates an NSAutoreleasePool when
+// instantiated and sends it a -drain message when destroyed.  This allows an
+// autorelease pool to be maintained in ordinary C++ code without bringing in
+// any direct Objective-C dependency.
+//
+// On other platforms, ScopedNSAutoreleasePool is an empty object with no
+// effects.  This allows it to be used directly in cross-platform code without
+// ugly #ifdefs.
+class ScopedNSAutoreleasePool {
+ public:
+#if !defined(OS_MACOSX)
+  ScopedNSAutoreleasePool() {}
+  void Recycle() { }
+#else  // OS_MACOSX
+  ScopedNSAutoreleasePool();
+  ~ScopedNSAutoreleasePool();
+
+  // Clear out the pool in case its position on the stack causes it to be
+  // alive for long periods of time (such as the entire length of the app).
+  // Only use then when you're certain the items currently in the pool are
+  // no longer needed.
+  void Recycle();
+ private:
+  NSAutoreleasePool* autorelease_pool_;
+#endif  // OS_MACOSX
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ScopedNSAutoreleasePool);
+};
+
+}  // namespace base
+
+#endif  // BASE_SCOPED_NSAUTORELEASE_POOL_H_