Remove ScrollableArea::notifyScrollPositionChanged and cleanup scroll animators.

Source/web/tests/PinchViewportTest.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 
 #include "core/frame/PinchViewport.h"
 
 #include "core/dom/Document.h"
 #include "core/frame/FrameHost.h"
@@ skipping 902 matching lines @@
     webViewImpl()->resizePinchViewport(IntSize(200, 100));
     webViewImpl()->setInitialFocus(false);
     pinchViewport.setLocation(FloatPoint());
     webViewImpl()->scrollFocusedNodeIntoRect(IntRect(0, 0, 500, 200));
 
     EXPECT_POINT_EQ(IntPoint(0, frame()->view()->maximumScrollPosition().y()),
         frame()->view()->scrollPosition());
     EXPECT_FLOAT_POINT_EQ(FloatPoint(150, 200), pinchViewport.visibleRect().location());
 
     // Try it again but with the page zoomed in
-    frame()->view()->notifyScrollPositionChanged(IntPoint(0, 0));
+    frame()->view()->setScrollPosition(IntPoint(0, 0), ProgrammaticScroll);
     webViewImpl()->resizePinchViewport(IntSize(500, 300));
     pinchViewport.setLocation(FloatPoint(0, 0));
 
     webViewImpl()->setPageScaleFactor(2);
     webViewImpl()->scrollFocusedNodeIntoRect(IntRect(0, 0, 500, 200));
     EXPECT_POINT_EQ(IntPoint(0, frame()->view()->maximumScrollPosition().y()),
         frame()->view()->scrollPosition());
     EXPECT_FLOAT_POINT_EQ(FloatPoint(125, 150), pinchViewport.visibleRect().location());
 
     // Once more but make sure that we don't move the pinch viewport unless necessary.
@@ skipping 724 matching lines @@
     registerMockedHttpURLLoad("window_dimensions_wide_div.html");
     webViewImpl()->resize(IntSize(800, 600));
     navigateTo(m_baseURL + "window_dimensions_wide_div.html");
 
     Element* output = frame()->document()->getElementById("output");
     ASSERT(output);
     EXPECT_EQ(std::string("2000x1500"), std::string(output->innerHTML().ascii().data()));
 }
 
 } // namespace