bug 819940 - remove nsISupportsArray::EnumerateBackwards() r=ehsan

xpcom/ds/nsISupportsArray.idl

@@ -40,7 +40,7 @@ NS_NewArrayEnumerator(nsISimpleEnumerator* *result,
                       nsISupportsArray* array);
 %}
 
-[scriptable, uuid(791eafa0-b9e6-11d1-8031-006008159b5a)]
+[scriptable, uuid(2d375c0f-8a34-4397-bea1-ab4d6beae0ab)]
 interface nsISupportsArray : nsICollection {
 
   [notxpcom] boolean Equals([const] in nsISupportsArray other);
@@ -77,9 +77,6 @@ interface nsISupportsArray : nsICollection {
   [notxpcom, noscript]
       boolean EnumerateForwards(in nsISupportsArrayEnumFunc aFunc,
                                 in voidPtr aData);
-  [notxpcom, noscript]
-      boolean EnumerateBackwards(in nsISupportsArrayEnumFunc aFunc,
-                                 in voidPtr aData);
 
   nsISupportsArray clone();
 

xpcom/ds/nsSupportsArray.cpp

@@ -583,18 +583,6 @@ nsSupportsArray::EnumerateForwards(nsISupportsArrayEnumFunc aFunc, void* aData)
   return running;
 }
 
-NS_IMETHODIMP_(bool)
-nsSupportsArray::EnumerateBackwards(nsISupportsArrayEnumFunc aFunc, void* aData)
-{
-  uint32_t aIndex = mCount;
-  bool    running = true;
-
-  while (running && (0 < aIndex--)) {
-    running = (*aFunc)(mArray[aIndex], aData);
-  }
-  return running;
-}
-
 NS_IMETHODIMP
 nsSupportsArray::Enumerate(nsIEnumerator* *result)
 {

xpcom/ds/nsSupportsArray.h

@@ -106,7 +106,6 @@ public:
   NS_IMETHOD Compact(void);
 
   NS_IMETHOD_(bool) EnumerateForwards(nsISupportsArrayEnumFunc aFunc, void* aData);
-  NS_IMETHOD_(bool) EnumerateBackwards(nsISupportsArrayEnumFunc aFunc, void* aData);
 
   NS_IMETHOD Clone(nsISupportsArray **_retval);