Add partitionsOutOfMemoryUsingXXX to know Blink memory usage from OOM crash reports

Source/wtf/Alias.cpp

+// Copyright (c) 2011 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.
+
+#include "config.h"
+#include "wtf/Alias.h"
+
+// TODO(tasak): This code is copied from //base/debug/alias.cc.
+// If Blink is allowed to use //base/debug, remove this code and use //base/debug.
+namespace WTF {
+
+#if COMPILER(MSVC)
+#pragma optimize("", off)
+#endif
+
+void alias(const void* var)
+{
+}
+
+#if COMPILER(MSVC)
+#pragma optimize("", on)
+#endif
+
+} // namespace WTF