Implement CSSOM Smooth Scroll API

Source/web/WebSettingsImpl.cpp

 /*
  * Copyright (C) 2009 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 692 matching lines @@
 void WebSettingsImpl::setAllowCustomScrollbarInMainFrame(bool enabled)
 {
     m_settings->setAllowCustomScrollbarInMainFrame(enabled);
 }
 
 void WebSettingsImpl::setCompositedScrollingForFramesEnabled(bool enabled)
 {
     m_settings->setCompositedScrollingForFramesEnabled(enabled);
 }
 
+void WebSettingsImpl::setCompositorDrivenScrollAnimationsEnabled(bool enabled)
+{
+    m_settings->setCompositorDrivenScrollAnimationsEnabled(enabled);
+}
+
 void WebSettingsImpl::setCompositorTouchHitTesting(bool enabled)
 {
     m_settings->setCompositorTouchHitTesting(enabled);
 }
 
 void WebSettingsImpl::setSelectTrailingWhitespaceEnabled(bool enabled)
 {
     m_settings->setSelectTrailingWhitespaceEnabled(enabled);
 }
 
@@ skipping 21 matching lines @@
 {
     m_settings->setUseSolidColorScrollbars(enabled);
 }
 
 void WebSettingsImpl::setMainFrameResizesAreOrientationChanges(bool enabled)
 {
     m_mainFrameResizesAreOrientationChanges = enabled;
 }
 
 } // namespace blink