Page::chrome() should return a reference.

Source/core/rendering/RenderMenuList.cpp

Index: Source/core/rendering/RenderMenuList.cpp
diff --git a/Source/core/rendering/RenderMenuList.cpp b/Source/core/rendering/RenderMenuList.cpp
index 665a923a12bea67b2e60390cd9161b1ee279096e..6b3d43f69f0debeb1756fe0e37998898a57d0ffe 100644
--- a/Source/core/rendering/RenderMenuList.cpp
+++ b/Source/core/rendering/RenderMenuList.cpp
@@ -320,7 +320,7 @@ void RenderMenuList::showPopup()
     if (m_popupIsVisible)
         return;
 
-    if (document()->page()->chrome()->hasOpenedPopup())
+    if (document()->page()->chrome().hasOpenedPopup())
         return;
 
     // Create m_innerBlock here so it ends up as the first child.
@@ -328,7 +328,7 @@ void RenderMenuList::showPopup()
     // inside the showPopup call and it would fail.
     createInnerBlock();
     if (!m_popup)
-        m_popup = document()->page()->chrome()->createPopupMenu(*document()->frame(), this);
+        m_popup = document()->page()->chrome().createPopupMenu(*document()->frame(), this);
     m_popupIsVisible = true;
 
     FloatQuad quad(localToAbsoluteQuad(FloatQuad(borderBoundingBox())));