From 257e69aae5710c191e633554edd9b6206336bd29 Mon Sep 17 00:00:00 2001
From: Mats Palmgren <matspal@gmail.com>
Date: Sat, 17 May 2014 23:10:53 +0000
Subject: [PATCH] Bug 1009263 - Add nsCheapSets::Clear() method that removes
 all entries and return it to minimal size in terms of memory use. 
 r=bsmedberg

---
 xpcom/ds/nsCheapSets.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/xpcom/ds/nsCheapSets.h b/xpcom/ds/nsCheapSets.h
index ccd577d886d3..0fabbebd380f 100644
--- a/xpcom/ds/nsCheapSets.h
+++ b/xpcom/ds/nsCheapSets.h
@@ -24,6 +24,14 @@ public:
   {
   }
   ~nsCheapSet()
+  {
+    Clear();
+  }
+
+  /**
+   * Remove all entries.
+   */
+  void Clear()
   {
     switch (mState) {
     case ZERO:
@@ -38,6 +46,7 @@ public:
       NS_NOTREACHED("bogus state");
       break;
     }
+    mState = ZERO;
   }
 
   nsresult Put(const KeyType aVal);