Use float for scroll offset.

third_party/WebKit/Source/core/html/forms/TextFieldInputType.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2011 Apple 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.
@@ skipping 210 matching lines @@
        event->type() == EventTypeNames::focus)) {
     LayoutTextControlSingleLine* layoutTextControl =
         toLayoutTextControlSingleLine(element().layoutObject());
     if (event->type() == EventTypeNames::blur) {
       if (LayoutBox* innerEditorLayoutObject =
               element().innerEditorElement()->layoutBox()) {
         // FIXME: This class has no need to know about PaintLayer!
         if (PaintLayer* innerLayer = innerEditorLayoutObject->layer()) {
           if (PaintLayerScrollableArea* innerScrollableArea =
                   innerLayer->getScrollableArea()) {
-            innerScrollableArea->setScrollPosition(
-                DoublePoint(innerScrollableArea->scrollOrigin()),
-                ProgrammaticScroll, ScrollBehaviorInstant);
+            innerScrollableArea->setScrollOffset(ScrollOffset(0, 0),
+                                                 ProgrammaticScroll);
           }
         }
       }
 
       layoutTextControl->capsLockStateMayHaveChanged();
     } else if (event->type() == EventTypeNames::focus) {
       layoutTextControl->capsLockStateMayHaveChanged();
     }
 
     element().forwardEvent(event);
@@ skipping 301 matching lines @@
   return shouldSpinButtonRespondToMouseEvents() && element().isFocused();
 }
 
 void TextFieldInputType::spinButtonDidReleaseMouseCapture(
     SpinButtonElement::EventDispatch eventDispatch) {
   if (eventDispatch == SpinButtonElement::EventDispatchAllowed)
     element().dispatchFormControlChangeEvent();
 }
 
 }  // namespace blink