--- a/layout/generic/nsGfxScrollFrame.cpp
+++ b/layout/generic/nsGfxScrollFrame.cpp
@@ -4829,42 +4829,42 @@ nsXULScrollFrame::AddRemoveScrollbar(nsB
 
      nsSize hSize = mHelper.mHScrollbarBox->GetXULPrefSize(aState);
      nsBox::AddMargin(mHelper.mHScrollbarBox, hSize);
 
      mHelper.SetScrollbarVisibility(mHelper.mHScrollbarBox, aAdd);
 
      bool hasHorizontalScrollbar;
      bool fit = AddRemoveScrollbar(hasHorizontalScrollbar,
-                                     mHelper.mScrollPort.y,
-                                     mHelper.mScrollPort.height,
-                                     hSize.height, aOnRightOrBottom, aAdd);
+                                   mHelper.mScrollPort.y,
+                                   mHelper.mScrollPort.height,
+                                   hSize.height, aOnRightOrBottom, aAdd);
      mHelper.mHasHorizontalScrollbar = hasHorizontalScrollbar;    // because mHasHorizontalScrollbar is a bool
-     if (!fit)
-        mHelper.SetScrollbarVisibility(mHelper.mHScrollbarBox, !aAdd);
-
+     if (!fit) {
+       mHelper.SetScrollbarVisibility(mHelper.mHScrollbarBox, !aAdd);
+     }
      return fit;
   } else {
      if (mHelper.mNeverHasVerticalScrollbar || !mHelper.mVScrollbarBox)
        return false;
 
      nsSize vSize = mHelper.mVScrollbarBox->GetXULPrefSize(aState);
      nsBox::AddMargin(mHelper.mVScrollbarBox, vSize);
 
      mHelper.SetScrollbarVisibility(mHelper.mVScrollbarBox, aAdd);
 
      bool hasVerticalScrollbar;
      bool fit = AddRemoveScrollbar(hasVerticalScrollbar,
-                                     mHelper.mScrollPort.x,
-                                     mHelper.mScrollPort.width,
-                                     vSize.width, aOnRightOrBottom, aAdd);
+                                   mHelper.mScrollPort.x,
+                                   mHelper.mScrollPort.width,
+                                   vSize.width, aOnRightOrBottom, aAdd);
      mHelper.mHasVerticalScrollbar = hasVerticalScrollbar;    // because mHasVerticalScrollbar is a bool
-     if (!fit)
-        mHelper.SetScrollbarVisibility(mHelper.mVScrollbarBox, !aAdd);
-
+     if (!fit) {
+       mHelper.SetScrollbarVisibility(mHelper.mVScrollbarBox, !aAdd);
+     }
      return fit;
   }
 }
 
 bool
 nsXULScrollFrame::AddRemoveScrollbar(bool& aHasScrollbar, nscoord& aXY,
                                      nscoord& aSize, nscoord aSbSize,
                                      bool aOnRightOrBottom, bool aAdd)