NS_ASSERTION(mStackPos > 0, "leaf w/o container"); nsIHTMLContent* parent = mStack[mStackPos-1].mContent; parent->AppendChildTo(aContent, PR_FALSE);
NS_START_STOPWATCH(mWatch) nsresult rv;
SinkContext::AddLeaf(nsIHTMLContent* aContent){  NS_ASSERTION(mStackPos > 0, "leaf w/o container");  nsIHTMLContent* parent = mStack[mStackPos-1].mContent;  parent->AppendChildTo(aContent, PR_FALSE);  // Mark sink dirty if it can safely reflow something  MaybeMarkSinkDirty();#ifdef DEBUG  if (mPreAppend && mSink->mDirty &&      SINK_LOG_TEST(gSinkLogModuleInfo,SINK_ALWAYS_REFLOW)) {    mSink->ForceReflow();  }#endif  return NS_OK;}