Replace various ScrollableArea scroll methods with setScrollPosition

Source/platform/graphics/GraphicsLayerTest.cpp

Index: Source/platform/graphics/GraphicsLayerTest.cpp
diff --git a/Source/platform/graphics/GraphicsLayerTest.cpp b/Source/platform/graphics/GraphicsLayerTest.cpp
index d7f5cbb55a21cfbbf0a58e688b8abc643bde9af5..53d1505adcaf9742ab545399016c5f305933f448 100644
--- a/Source/platform/graphics/GraphicsLayerTest.cpp
+++ b/Source/platform/graphics/GraphicsLayerTest.cpp
@@ -147,8 +147,8 @@ public:
         return IntPoint(contentsSize().width() - visibleWidth(), contentsSize().height() - visibleHeight());
     }
 
-    virtual void setScrollOffset(const IntPoint& scrollOffset) override { m_scrollPosition = scrollOffset; }
-    virtual void setScrollOffset(const DoublePoint& scrollOffset) override { m_scrollPosition = scrollOffset; }
+    virtual void setScrollOffset(const IntPoint& scrollOffset, ScrollType) override { m_scrollPosition = scrollOffset; }
+    virtual void setScrollOffset(const DoublePoint& scrollOffset, ScrollType) override { m_scrollPosition = scrollOffset; }
     virtual DoublePoint scrollPositionDouble() const override { return m_scrollPosition; }
     virtual IntPoint scrollPosition() const override { return flooredIntPoint(m_scrollPosition); }