Page::chrome() should return a reference.

Source/core/page/FocusController.cpp

Index: Source/core/page/FocusController.cpp
diff --git a/Source/core/page/FocusController.cpp b/Source/core/page/FocusController.cpp
index c3b7a5faffb3ce79e1a154c9cfcc1b4fcda23738..e0279556bea43f30669a9bdb65ffd326279af312 100644
--- a/Source/core/page/FocusController.cpp
+++ b/Source/core/page/FocusController.cpp
@@ -300,10 +300,10 @@ bool FocusController::advanceFocusInDocumentOrder(FocusDirection direction, Keyb
 
     if (!node) {
         // We didn't find a node to focus, so we should try to pass focus to Chrome.
-        if (!initialFocus && m_page->chrome()->canTakeFocus(direction)) {
+        if (!initialFocus && m_page->chrome().canTakeFocus(direction)) {
             document->setFocusedNode(0);
             setFocusedFrame(0);
-            m_page->chrome()->takeFocus(direction);
+            m_page->chrome().takeFocus(direction);
             return true;
         }