Adding support for Smart GO NEXT feature in Android Chrome

Source/web/WebViewImpl.h

Index: Source/web/WebViewImpl.h
diff --git a/Source/web/WebViewImpl.h b/Source/web/WebViewImpl.h
index b5499e88c02e92c0434dd7473471bb7ddcdf541a..9c8725d4cc8645656dd993bca4c938038775edb3 100644
--- a/Source/web/WebViewImpl.h
+++ b/Source/web/WebViewImpl.h
@@ -185,6 +185,7 @@ public:
     virtual void clearFocusedElement() override;
     virtual bool scrollFocusedNodeIntoRect(const WebRect&) override;
     virtual void zoomToFindInPageRect(const WebRect&);
+    virtual void advanceFocusInForm(WebFocusType) override;
     virtual void advanceFocus(bool reverse) override;
     virtual double zoomLevel() override;
     virtual double setZoomLevel(double) override;
@@ -555,6 +556,8 @@ private:
 
     WebTextInputType textInputType();
     int textInputFlags();
+    Element* nextFocusableElementInForm(Element*, WebFocusType);
+    bool isListeningToKeyboardEvents(Element*);
 
     WebString inputModeOfFocusedElement();