Bug 1122788 - nsMultiplexInputStream should not use Tell() in debug builds, r=bz

xpcom/io/nsMultiplexInputStream.cpp

@@ -141,25 +141,10 @@ nsMultiplexInputStream::GetCount(uint32_t* aCount)
   return NS_OK;
 }
 
-#ifdef DEBUG
-static bool
-SeekableStreamAtBeginning(nsIInputStream* aStream)
-{
-  int64_t streamPos;
-  nsCOMPtr<nsISeekableStream> stream = do_QueryInterface(aStream);
-  if (stream && NS_SUCCEEDED(stream->Tell(&streamPos)) && streamPos != 0) {
-    return false;
-  }
-  return true;
-}
-#endif
-
 NS_IMETHODIMP
 nsMultiplexInputStream::AppendStream(nsIInputStream* aStream)
 {
   MutexAutoLock lock(mLock);
-  NS_ASSERTION(SeekableStreamAtBeginning(aStream),
-               "Appended stream not at beginning.");
   return mStreams.AppendElement(aStream) ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
 }
 
@@ -167,8 +152,6 @@ NS_IMETHODIMP
 nsMultiplexInputStream::InsertStream(nsIInputStream* aStream, uint32_t aIndex)
 {
   MutexAutoLock lock(mLock);
-  NS_ASSERTION(SeekableStreamAtBeginning(aStream),
-               "Inserted stream not at beginning.");
   mStreams.InsertElementAt(aIndex, aStream);
   if (mCurrentStream > aIndex ||
       (mCurrentStream == aIndex && mStartedReadingCurrent)) {