NS_INIT_ISUPPORTS(); mOuter = aOuter; mMaxElementSize.width = 0; mMaxElementSize.height = 0; mFirstPass = PR_FALSE; mNeverHasVerticalScrollbar   = PR_FALSE; mNeverHasHorizontalScrollbar = PR_FALSE;
nsGfxScrollFrameInner::nsGfxScrollFrameInner(nsContainerFrame* aOuter, PRBool aIsRoot)  : mScrollableView(nsnull),    mHScrollbarBox(nsnull),    mVScrollbarBox(nsnull),    mScrolledFrame(nsnull),    mScrollCornerBox(nsnull),    mOuter(aOuter),    mOnePixel(20),    mRestoreRect(-1, -1, -1, -1),    mLastPos(-1, -1),    mLastDir(-1),    mNeverHasVerticalScrollbar(PR_FALSE),    mNeverHasHorizontalScrollbar(PR_FALSE),    mHasVerticalScrollbar(PR_FALSE),     mHasHorizontalScrollbar(PR_FALSE),    mViewInitiatedScroll(PR_FALSE),    mFrameInitiatedScroll(PR_FALSE),    mDidHistoryRestore(PR_FALSE),    mIsRoot(aIsRoot),    mSupppressScrollbarUpdate(PR_FALSE),    mDidLoadHistoryVScrollbarHint(PR_FALSE),    mHistoryVScrollbarHint(PR_FALSE),    mHadNonInitialReflow(PR_FALSE),    mHorizontalOverflow(PR_FALSE),    mVerticalOverflow(PR_FALSE){}