Refactor fixed layout mode

Source/core/dom/Element.cpp

Index: Source/core/dom/Element.cpp
diff --git a/Source/core/dom/Element.cpp b/Source/core/dom/Element.cpp
index afbde126496ec02e8532d782134a5688b53c9714..35f5599808cc0c1fab1c7538a531cd4a905fba7e 100644
--- a/Source/core/dom/Element.cpp
+++ b/Source/core/dom/Element.cpp
@@ -651,7 +651,7 @@ int Element::clientWidth()
         || (inQuirksMode && isHTMLElement() && document().body() == this)) {
         if (FrameView* view = document().view()) {
             if (RenderView* renderView = document().renderView())
-                return adjustForAbsoluteZoom(view->layoutWidth(), renderView);
+                return adjustForAbsoluteZoom(view->layoutSize().width(), renderView);
         }
     }
 
@@ -672,7 +672,7 @@ int Element::clientHeight()
         || (inQuirksMode && isHTMLElement() && document().body() == this)) {
         if (FrameView* view = document().view()) {
             if (RenderView* renderView = document().renderView())
-                return adjustForAbsoluteZoom(view->layoutHeight(), renderView);
+                return adjustForAbsoluteZoom(view->layoutSize().height(), renderView);
         }
     }