Use float for scroll offset.

third_party/WebKit/Source/core/frame/LocalFrame.cpp

Index: third_party/WebKit/Source/core/frame/LocalFrame.cpp
diff --git a/third_party/WebKit/Source/core/frame/LocalFrame.cpp b/third_party/WebKit/Source/core/frame/LocalFrame.cpp
index abd6e8f63e13730ed35330d38dd3ae56f6ea984b..b1cdaac3e46bb9afba083490e3f4fc6cb98275ce 100644
--- a/third_party/WebKit/Source/core/frame/LocalFrame.cpp
+++ b/third_party/WebKit/Source/core/frame/LocalFrame.cpp
@@ -631,11 +631,11 @@ void LocalFrame::setPageAndTextZoomFactors(float pageZoomFactor,
   if (m_pageZoomFactor != pageZoomFactor) {
     if (FrameView* view = this->view()) {
       // Update the scroll position when doing a full page zoom, so the content stays in relatively the same position.
-      LayoutPoint scrollPosition = view->scrollPosition();
+      ScrollOffset scrollOffset = view->scrollOffset();
       float percentDifference = (pageZoomFactor / m_pageZoomFactor);
-      view->setScrollPosition(
-          DoublePoint(scrollPosition.x() * percentDifference,
-                      scrollPosition.y() * percentDifference),
+      view->setScrollOffset(
+          ScrollOffset(scrollOffset.width() * percentDifference,
+                       scrollOffset.height() * percentDifference),
           ProgrammaticScroll);
     }
   }