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-rw-r--r--dom/base/nsISizeOfEventTarget.h42
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diff --git a/dom/base/nsISizeOfEventTarget.h b/dom/base/nsISizeOfEventTarget.h
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+++ b/dom/base/nsISizeOfEventTarget.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef nsISizeOfEventTarget_h___
+#define nsISizeOfEventTarget_h___
+
+#include "mozilla/MemoryReporting.h"
+#include "nsISupports.h"
+
+#define NS_ISIZEOFEVENTTARGET_IID \
+ { \
+ 0xa1e08cb9, 0x5455, 0x4593, { \
+ 0xb4, 0x1f, 0x38, 0x7a, 0x85, 0x44, 0xd0, 0xb5 \
+ } \
+ }
+
+/**
+ * This class is much the same as nsISizeOf, but is specifically for measuring
+ * the contents of nsGlobalWindow::mEventTargetObjects.
+ *
+ * We don't use nsISizeOf because if we did, any object belonging to
+ * mEventTargetObjects that implements nsISizeOf would be measured, which we
+ * may not want (perhaps because the object is also measured elsewhere).
+ */
+class nsISizeOfEventTarget : public nsISupports {
+ public:
+ NS_DECLARE_STATIC_IID_ACCESSOR(NS_ISIZEOFEVENTTARGET_IID)
+
+ /**
+ * Measures the size of the things pointed to by the object, plus the object
+ * itself.
+ */
+ virtual size_t SizeOfEventTargetIncludingThis(
+ mozilla::MallocSizeOf aMallocSizeOf) const = 0;
+};
+
+NS_DEFINE_STATIC_IID_ACCESSOR(nsISizeOfEventTarget, NS_ISIZEOFEVENTTARGET_IID)
+
+#endif /* nsISizeOfEventTarget_h___ */