Use float for scroll offset.

third_party/WebKit/Source/web/FindInPageCoordinates.cpp

 /*
  * Copyright (C) 2012 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 78 matching lines @@
   // Make the coordinates relative to the container enclosing bounding box.
   // Since we work with rects enclosing quad unions this is still
   // transform-friendly.
   FloatRect normalizedRect = absoluteRect;
   normalizedRect.moveBy(-containerRect.location());
 
   // Fixed positions do not make sense in this coordinate system, but need to
   // leave consistent tickmarks.  So, use their position when the view is not
   // scrolled, like an absolute position.
   if (layoutObject->style()->position() == FixedPosition &&
-      container->isLayoutView())
-    normalizedRect.moveBy(
-        -toLayoutView(container)->frameView()->scrollPosition());
+      container->isLayoutView()) {
+    normalizedRect.move(-toLayoutView(container)->frameView()->scrollOffset());
+  }
 
   normalizedRect.scale(1 / containerRect.width(), 1 / containerRect.height());
   return normalizedRect;
 }
 
 FloatRect findInPageRectFromAbsoluteRect(const FloatRect& inputRect,
                                          const LayoutObject* baseLayoutObject) {
   if (!baseLayoutObject || inputRect.isEmpty())
     return FloatRect();
 
@@ skipping 33 matching lines @@
 FloatRect findInPageRectFromRange(Range* range) {
   if (!range || !range->firstNode())
     return FloatRect();
 
   return findInPageRectFromAbsoluteRect(
       LayoutObject::absoluteBoundingBoxRectForRange(range),
       range->firstNode()->layoutObject());
 }
 
 }  // namespace blink