Add partitionsOutOfMemoryUsingXXX to know Blink memory usage from OOM crash reports

Source/wtf/Alias.h

Index: Source/wtf/Alias.h
diff --git a/Source/wtf/Alias.h b/Source/wtf/Alias.h
new file mode 100644
index 0000000000000000000000000000000000000000..cc0ed6efeaab0240b96b95fe7e3b09c2045684f1
--- /dev/null
+++ b/Source/wtf/Alias.h
@@ -0,0 +1,19 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.

[haraken, 2015/09/04 05:22:45]

2015

[tasak, 2015/09/04 06:12:06]

Since I copied //base/debug/alias.h, I think, we should not modify copyright.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef Alias_h
+#define Alias_h
+
+#include "wtf/WTFExport.h"
+
+namespace WTF {
+
+// Make the optimizer think that var is aliased. This is to prevent it from
+// optimizing out variables that that would not otherwise be live at the point

[haraken, 2015/09/04 05:22:45]

that that

[tasak, 2015/09/04 06:12:06]

Done.

+// of a potential crash.
+void WTF_EXPORT alias(const void* var);

[haraken, 2015/09/04 05:22:45]

Shall we add this to Compiler.h instead of introducing a new file?

[tasak, 2015/09/04 06:12:06]

So we will add Compiler.cpp?

+
+} // namespace WTF
+
+#endif // Alias_h