Minor cleanup to RenderLayerScrollableArea::setNeedsCompositedScrolling.

Source/core/rendering/RenderLayerScrollableArea.cpp

Index: Source/core/rendering/RenderLayerScrollableArea.cpp
diff --git a/Source/core/rendering/RenderLayerScrollableArea.cpp b/Source/core/rendering/RenderLayerScrollableArea.cpp
index 591abf0e3a4161669ef8099d60cfe71f1d77f50e..826344e6d52992794f1026937917626fe888192f 100644
--- a/Source/core/rendering/RenderLayerScrollableArea.cpp
+++ b/Source/core/rendering/RenderLayerScrollableArea.cpp
@@ -1454,8 +1454,8 @@ void RenderLayerScrollableArea::updateNeedsCompositedScrolling()
         needsCompositedScrolling |= needsToBeStackingContainer;
     }
 
-    const bool needsCompositedScrollingDidChange = setNeedsCompositedScrolling(needsCompositedScrolling);
-    if (needsToBeStackingContainerDidChange || needsCompositedScrollingDidChange) {
+    if (needsToBeStackingContainerDidChange || this->needsCompositedScrolling() != needsCompositedScrolling) {
+        setNeedsCompositedScrolling(needsCompositedScrolling);
         // Note, the z-order lists may need to be rebuilt, but our code guarantees
         // that we have not affected stacking, so we will not dirty
         // m_descendantsAreContiguousInStackingOrder for either us or our stacking
@@ -1464,15 +1464,6 @@ void RenderLayerScrollableArea::updateNeedsCompositedScrolling()
     }
 }
 
-bool RenderLayerScrollableArea::setNeedsCompositedScrolling(bool needsCompositedScrolling)
-{
-    if (this->needsCompositedScrolling() == needsCompositedScrolling)
-        return false;
-
-    m_needsCompositedScrolling = needsCompositedScrolling;
-    return true;
-}
-
 void RenderLayerScrollableArea::updateCompositingLayersAfterScroll()
 {
     RenderLayerCompositor* compositor = m_box->view()->compositor();