Return Frame&, not Frame* from RenderView::frame()

Source/core/rendering/RenderView.cpp

Index: Source/core/rendering/RenderView.cpp
diff --git a/Source/core/rendering/RenderView.cpp b/Source/core/rendering/RenderView.cpp
index 8b056b372a6fdb647f9a7b51a80bdedf14e0cd2a..2bd7a989bdea7da2b95ab3ae72e3f1b98b426afb 100644
--- a/Source/core/rendering/RenderView.cpp
+++ b/Source/core/rendering/RenderView.cpp
@@ -874,7 +874,7 @@ bool RenderView::shouldUsePrintingLayout() const
 {
     if (!printing() || !m_frameView)
         return false;
-    return m_frameView->frame()->shouldUsePrintingLayout();
+    return m_frameView->frame().shouldUsePrintingLayout();
 }
 
 size_t RenderView::getRetainedWidgets(Vector<RenderWidget*>& renderWidgets)
@@ -1010,7 +1010,7 @@ int RenderView::viewLogicalHeight() const
 
 float RenderView::zoomFactor() const
 {
-    return m_frameView->frame()->pageZoomFactor();
+    return m_frameView->frame().pageZoomFactor();
 }
 
 void RenderView::pushLayoutState(RenderObject* root)
@@ -1113,7 +1113,7 @@ bool RenderView::backgroundIsKnownToBeOpaqueInRect(const LayoutRect&) const
     // FIXME: Remove this main frame check. Same concept applies to subframes too.
     Page* page = document().page();
     Frame* mainFrame = page ? page->mainFrame() : 0;
-    if (!m_frameView || m_frameView->frame() != mainFrame)
+    if (!m_frameView || &m_frameView->frame() != mainFrame)
         return false;
 
     return m_frameView->hasOpaqueBackground();