Rename Document::ownerElement to localOwner and fix main frame checks.

third_party/WebKit/Source/core/layout/LayoutBox.cpp

Index: third_party/WebKit/Source/core/layout/LayoutBox.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutBox.cpp b/third_party/WebKit/Source/core/layout/LayoutBox.cpp
index 70e2509cb39ec661154035ac38b7e44ec691b6e9..5c5d61173fbe0aa549a05748e4402a567a6e8427 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBox.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutBox.cpp
@@ -543,7 +543,7 @@ void LayoutBox::scrollRectToVisible(const LayoutRect& rect, const ScrollAlignmen
         newRect = getScrollableArea()->scrollIntoView(rect, alignX, alignY, scrollType);
     } else if (!parentBox && canBeProgramaticallyScrolled()) {
         if (FrameView* frameView = this->frameView()) {
-            HTMLFrameOwnerElement* ownerElement = document().ownerElement();
+            HTMLFrameOwnerElement* ownerElement = document().localOwnerElement();
             if (!isDisallowedAutoscroll(ownerElement, frameView)) {
                 if (makeVisibleInVisualViewport) {
                     frameView->getScrollableArea()->scrollIntoView(rect, alignX, alignY, scrollType);
@@ -855,8 +855,8 @@ IntSize LayoutBox::calculateAutoscrollDirection(const IntPoint& pointInRootFrame
 LayoutBox* LayoutBox::findAutoscrollable(LayoutObject* layoutObject)
 {
     while (layoutObject && !(layoutObject->isBox() && toLayoutBox(layoutObject)->canAutoscroll())) {
-        if (!layoutObject->parent() && layoutObject->node() == layoutObject->document() && layoutObject->document().ownerElement())
-            layoutObject = layoutObject->document().ownerElement()->layoutObject();
+        if (!layoutObject->parent() && layoutObject->node() == layoutObject->document() && layoutObject->document().localOwnerElement())
+            layoutObject = layoutObject->document().localOwnerElement()->layoutObject();
         else
             layoutObject = layoutObject->parent();
     }