Remove unused second parameter to scrollContentsFastPath

Source/platform/scroll/ScrollView.cpp

Index: Source/platform/scroll/ScrollView.cpp
diff --git a/Source/platform/scroll/ScrollView.cpp b/Source/platform/scroll/ScrollView.cpp
index 9dc921add079e4779ccfd1076cce692a013cd651..9dc762c1aa540cc5745b7c6cbb6adc1377e7eff8 100644
--- a/Source/platform/scroll/ScrollView.cpp
+++ b/Source/platform/scroll/ScrollView.cpp
@@ -536,12 +536,9 @@ void ScrollView::scrollContents(const IntSize& scrollDelta)
     if (!window)
         return;
 
-    // Since scrolling is double buffered, we will be blitting the scroll view's intersection
-    // with the clip rect every time to keep it smooth.
     IntRect clipRect = windowClipRect();
-    IntRect scrollViewRect = rectToCopyOnScroll();
     IntRect updateRect = clipRect;
-    updateRect.intersect(scrollViewRect);
+    updateRect.intersect(rectToCopyOnScroll());
 
     if (m_drawPanScrollIcon) {
         // FIXME: the pan icon is broken when accelerated compositing is on, since it will draw under the compositing layers.
@@ -553,7 +550,7 @@ void ScrollView::scrollContents(const IntSize& scrollDelta)
         window->invalidateContentsAndRootView(panScrollIconDirtyRect);
     }
 
-    if (!scrollContentsFastPath(-scrollDelta, scrollViewRect))
+    if (!scrollContentsFastPath(-scrollDelta))
         scrollContentsSlowPath(updateRect);
 
     // Invalidate the overhang areas if they are visible.
@@ -563,7 +560,7 @@ void ScrollView::scrollContents(const IntSize& scrollDelta)
     frameRectsChanged();
 }
 
-bool ScrollView::scrollContentsFastPath(const IntSize& scrollDelta, const IntRect& rectToScroll)
+bool ScrollView::scrollContentsFastPath(const IntSize& scrollDelta)
 {
     hostWindow()->scroll();
     return true;