Allow objects without scrollbars to be scrollable

Source/web/tests/ScrollAnimatorNoneTest.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 34 matching lines @@
 using testing::Return;
 using testing::_;
 
 class MockScrollableArea : public ScrollableArea {
 public:
     MockScrollableArea(bool scrollAnimatorEnabled)
         : m_scrollAnimatorEnabled(scrollAnimatorEnabled) { }
 
     MOCK_CONST_METHOD0(isActive, bool());
     MOCK_CONST_METHOD1(scrollSize, int(ScrollbarOrientation));
-    MOCK_CONST_METHOD1(scrollPosition, int(Scrollbar*));
     MOCK_METHOD2(invalidateScrollbar, void(Scrollbar*, const IntRect&));
     MOCK_CONST_METHOD0(isScrollCornerVisible, bool());
     MOCK_CONST_METHOD0(scrollCornerRect, IntRect());
     MOCK_METHOD1(setScrollOffset, void(const IntPoint&));
     MOCK_METHOD2(invalidateScrollbarRect, void(Scrollbar*, const IntRect&));
     MOCK_METHOD1(invalidateScrollCornerRect, void(const IntRect&));
     MOCK_METHOD1(setScrollOffsetFromAnimation, void(const IntPoint&));
     MOCK_CONST_METHOD0(enclosingScrollableArea, ScrollableArea*());
     MOCK_CONST_METHOD0(minimumScrollPosition, IntPoint());
     MOCK_CONST_METHOD0(maximumScrollPosition, IntPoint());
     MOCK_CONST_METHOD1(visibleContentRect, IntRect(VisibleContentRectIncludesScrollbars));
     MOCK_CONST_METHOD0(contentsSize, IntSize());
     MOCK_CONST_METHOD0(overhangAmount, IntSize());
     MOCK_CONST_METHOD0(scrollbarsCanBeActive, bool());
     MOCK_CONST_METHOD0(scrollableAreaBoundingBox, IntRect());
 
+    virtual bool userInputScrollable(ScrollbarOrientation) const OVERRIDE { return true; }
     virtual IntPoint scrollPosition() const OVERRIDE { return IntPoint(); }
     virtual int visibleHeight() const OVERRIDE { return 768; }
     virtual int visibleWidth() const OVERRIDE { return 1024; }
     virtual bool scrollAnimatorEnabled() const OVERRIDE { return m_scrollAnimatorEnabled; }
+    virtual int pageStep(ScrollbarOrientation) const OVERRIDE { return 0; }
 
 private:
     bool m_scrollAnimatorEnabled;
 };
 
 class MockScrollAnimatorNone : public ScrollAnimatorNone {
 public:
     MockScrollAnimatorNone()
         : ScrollAnimatorNone(new MockScrollableArea(true)) { }
     MockScrollAnimatorNone(ScrollableArea* scrollableArea)
@@ skipping 953 matching lines @@
     EXPECT_TRUE(result);
     result = result && animateScroll(t);
     double after = m_currentPosition;
     EXPECT_GE(before, after);
 
     t += kAnimationTime;
     for (; result && t < kEndTime; t += kAnimationTime)
         result = result && animateScroll(t);
     EXPECT_GE(before, m_currentPosition);
 }