From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <mattatobin@localhost.localdomain>
Date: Fri, 2 Feb 2018 04:16:08 -0500
Subject: Add m-esr52 at 52.6.0

---
 layout/base/nsIPercentBSizeObserver.h | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 layout/base/nsIPercentBSizeObserver.h

(limited to 'layout/base/nsIPercentBSizeObserver.h')

diff --git a/layout/base/nsIPercentBSizeObserver.h b/layout/base/nsIPercentBSizeObserver.h
new file mode 100644
index 000000000..cd6a9618c
--- /dev/null
+++ b/layout/base/nsIPercentBSizeObserver.h
@@ -0,0 +1,33 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 nsIPercentBSizeObserver_h___
+#define nsIPercentBSizeObserver_h___
+
+#include "nsQueryFrame.h"
+
+namespace mozilla {
+struct ReflowInput;
+} // namespace mozilla
+
+/**
+ * This interface is supported by frames that need to provide computed bsize
+ * values to children during reflow which would otherwise not happen. Currently
+ * only table cells support this.
+ */
+class nsIPercentBSizeObserver
+{
+public:
+  NS_DECL_QUERYFRAME_TARGET(nsIPercentBSizeObserver)
+
+  // Notify the observer that aReflowInput has no computed bsize,
+  // but it has a percent bsize
+  virtual void NotifyPercentBSize(const mozilla::ReflowInput& aReflowInput) = 0;
+
+  // Ask the observer if it should observe aReflowInput.frame
+  virtual bool NeedsToObserve(const mozilla::ReflowInput& aReflowInput) = 0;
+};
+
+#endif // nsIPercentBSizeObserver_h___ 
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