Remove m_margins member from FrameView

Source/core/rendering/RenderFrame.cpp

Index: Source/core/rendering/RenderFrame.cpp
diff --git a/Source/core/rendering/RenderFrame.cpp b/Source/core/rendering/RenderFrame.cpp
index 329ae3422b43204c555321017a44d2e8854f2c10..3468cc3af7c826f5c39a95d24c33fd02f9c822ea 100644
--- a/Source/core/rendering/RenderFrame.cpp
+++ b/Source/core/rendering/RenderFrame.cpp
@@ -47,21 +47,4 @@ void RenderFrame::updateFromElement()
         toRenderFrameSet(parent())->notifyFrameEdgeInfoChanged();
 }
 
-void RenderFrame::viewCleared()
-{
-    HTMLFrameElement* element = toHTMLFrameElement(node());
-    if (!element || !widget() || !widget()->isFrameView())
-        return;
-
-    FrameView* view = toFrameView(widget());
-
-    int marginWidth = element->marginWidth();
-    int marginHeight = element->marginHeight();
-
-    if (marginWidth != -1)
-        view->setMarginWidth(marginWidth);
-    if (marginHeight != -1)
-        view->setMarginHeight(marginHeight);
-}
-
 } // namespace WebCore