Remove unused second parameter to scrollContentsFastPath

Source/core/frame/FrameView.cpp

Index: Source/core/frame/FrameView.cpp
diff --git a/Source/core/frame/FrameView.cpp b/Source/core/frame/FrameView.cpp
index 92f6882e2ccaf1c5bfc59deba4af42b5e6815ec3..24fedbf53ca36418fb8ebf934ef8748e5600d81a 100644
--- a/Source/core/frame/FrameView.cpp
+++ b/Source/core/frame/FrameView.cpp
@@ -1255,7 +1255,7 @@ void FrameView::scrollContentsIfNeeded()
         updateFixedElementPaintInvalidationRectsAfterScroll();
 }
 
-bool FrameView::scrollContentsFastPath(const IntSize& scrollDelta, const IntRect& rectToScroll)
+bool FrameView::scrollContentsFastPath(const IntSize& scrollDelta)
 {
     if (!contentsInCompositedLayer() || hasSlowRepaintObjects())
         return false;
@@ -1265,7 +1265,6 @@ bool FrameView::scrollContentsFastPath(const IntSize& scrollDelta, const IntRect
         return true;
     }
 
-    // Get the rects of the fixed objects visible in the rectToScroll
     Region regionToUpdate;
     ViewportConstrainedObjectSet::const_iterator end = m_viewportConstrainedObjects->end();
     for (ViewportConstrainedObjectSet::const_iterator it = m_viewportConstrainedObjects->begin(); it != end; ++it) {