Bug 1308317 - Part 3: Remove nsSupportsArray::SizeTo. r=froydnj

|SizeTo| is not scriptable and unused in our codebase.

MozReview-Commit-ID: 1DrTm46qbar

xpcom/ds/nsISupportsArray.idl

@@ -65,9 +65,6 @@ interface nsISupportsArray : nsICollection {
 
   [notxpcom] boolean RemoveElementsAt(in unsigned long aIndex,
                                       in unsigned long aCount);
-
-  [notxpcom] boolean SizeTo(in long aSize);
-  
 };
 
 %{C++

xpcom/ds/nsSupportsArray.cpp

@@ -396,38 +396,6 @@ nsSupportsArray::Compact(void)
   return NS_OK;
 }
 
-NS_IMETHODIMP_(bool)
-nsSupportsArray::SizeTo(int32_t aSize)
-{
-  NS_ASSERTION(aSize >= 0, "negative aSize!");
-
-  // XXX for aSize < mCount we could resize to mCount
-  if (mArraySize == (uint32_t)aSize || (uint32_t)aSize < mCount) {
-    return true;  // nothing to do
-  }
-
-  // switch back to autoarray if possible
-  nsISupports** oldArray = mArray;
-  if ((uint32_t)aSize <= kAutoArraySize) {
-    mArray = mAutoArray;
-    mArraySize = kAutoArraySize;
-  } else {
-    mArray = new nsISupports*[aSize];
-    if (!mArray) {
-      mArray = oldArray;
-      return false;
-    }
-    mArraySize = aSize;
-  }
-
-  ::memcpy(mArray, oldArray, mCount * sizeof(nsISupports*));
-  if (oldArray != mAutoArray) {
-    delete[] oldArray;
-  }
-
-  return true;
-}
-
 NS_IMETHODIMP
 nsSupportsArray::Enumerate(nsIEnumerator** aResult)
 {

xpcom/ds/nsSupportsArray.h

@@ -117,8 +117,6 @@ public:
   MOZ_MUST_USE NS_IMETHOD_(bool)
   RemoveElementsAt(uint32_t aIndex, uint32_t aCount) override;
 
-  MOZ_MUST_USE NS_IMETHOD_(bool)
-  SizeTo(int32_t aSize) override;
 protected:
   void DeleteArray(void);