Cleanup ScrollableArea scrolling API

Source/platform/scroll/ScrollableAreaTest.cpp

Index: Source/platform/scroll/ScrollableAreaTest.cpp
diff --git a/Source/platform/scroll/ScrollableAreaTest.cpp b/Source/platform/scroll/ScrollableAreaTest.cpp
index d5b52199b8d34da57cda11081868f063f39cad91..21d6984e99f72f7f30e493252e118c3633b8a2db 100644
--- a/Source/platform/scroll/ScrollableAreaTest.cpp
+++ b/Source/platform/scroll/ScrollableAreaTest.cpp
@@ -30,7 +30,6 @@ public:
     MOCK_METHOD2(invalidateScrollbarRect, void(Scrollbar*, const IntRect&));
     MOCK_METHOD1(invalidateScrollCornerRect, void(const IntRect&));
     MOCK_CONST_METHOD0(enclosingScrollableArea, ScrollableArea*());
-    MOCK_CONST_METHOD0(minimumScrollPosition, IntPoint());
     MOCK_CONST_METHOD1(visibleContentRect, IntRect(IncludeScrollbarsInRect));
     MOCK_CONST_METHOD0(contentsSize, IntSize());
     MOCK_CONST_METHOD0(scrollbarsCanBeActive, bool());
@@ -40,6 +39,7 @@ public:
     virtual bool shouldPlaceVerticalScrollbarOnLeft() const override { return false; }
     virtual void setScrollOffset(const IntPoint& offset, ScrollType) override { m_scrollPosition = offset.shrunkTo(m_maximumScrollPosition); }
     virtual IntPoint scrollPosition() const override { return m_scrollPosition; }
+    virtual IntPoint minimumScrollPosition() const override { return IntPoint(); }
     virtual IntPoint maximumScrollPosition() const override { return m_maximumScrollPosition; }
     virtual int visibleHeight() const override { return 768; }
     virtual int visibleWidth() const override { return 1024; }
@@ -117,7 +117,7 @@ private:
 TEST_F(ScrollableAreaTest, ScrollAnimatorCurrentPositionShouldBeSync)
 {
     MockScrollableArea scrollableArea(IntPoint(0, 100));
-    scrollableArea.notifyScrollPositionChanged(IntPoint(0, 10000));
+    scrollableArea.setScrollPosition(IntPoint(0, 10000), CompositorScroll);
     EXPECT_EQ(100.0, scrollableArea.scrollAnimator()->currentPosition().y());
 }