Revert 190605 "Make RenderObject::style() return a const object"

trunk/Source/core/frame/FrameView.cpp

Index: trunk/Source/core/frame/FrameView.cpp
===================================================================
--- trunk/Source/core/frame/FrameView.cpp	(revision 190671)
+++ trunk/Source/core/frame/FrameView.cpp	(working copy)
@@ -1297,15 +1297,15 @@
 
     for (const auto& viewportConstrainedObject : *m_viewportConstrainedObjects) {
         LayoutObject* renderer = viewportConstrainedObject;
-        const LayoutStyle& style = renderer->styleRef();
+        LayoutStyle* style = renderer->style();
         if (widthChanged) {
-            if (style.width().isFixed() && (style.left().isAuto() || style.right().isAuto()))
+            if (style->width().isFixed() && (style->left().isAuto() || style->right().isAuto()))
                 renderer->setNeedsPositionedMovementLayout();
             else
                 renderer->setNeedsLayoutAndFullPaintInvalidation();
         }
         if (heightChanged) {
-            if (style.height().isFixed() && (style.top().isAuto() || style.bottom().isAuto()))
+            if (style->height().isFixed() && (style->top().isAuto() || style->bottom().isAuto()))
                 renderer->setNeedsPositionedMovementLayout();
             else
                 renderer->setNeedsLayoutAndFullPaintInvalidation();