Implementation of CSS3 nav-up/down/left/right properties from CSS3 UI

third_party/WebKit/Source/core/page/FocusController.h

Index: third_party/WebKit/Source/core/page/FocusController.h
diff --git a/third_party/WebKit/Source/core/page/FocusController.h b/third_party/WebKit/Source/core/page/FocusController.h
index c4c2370fb8bb84fe818b1c9846a07e646357bc28..b70657cdce170355a1bce2d86971217cbbe0ef3f 100644
--- a/third_party/WebKit/Source/core/page/FocusController.h
+++ b/third_party/WebKit/Source/core/page/FocusController.h
@@ -1,5 +1,7 @@
 /*
  * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
+ * Copyright (C) 2013, 2014 Opera Software ASA. All rights reserved.
+ * Copyright (C) 2016 Samsung Electronics. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -70,6 +72,7 @@ public:
     bool setInitialFocus(WebFocusType);
     bool advanceFocus(WebFocusType type, InputDeviceCapabilities* sourceCapabilities = nullptr) { return advanceFocus(type, false, sourceCapabilities); }
     bool advanceFocusAcrossFrames(WebFocusType, RemoteFrame* from, LocalFrame* to, InputDeviceCapabilities* sourceCapabilities = nullptr);
+    bool advanceCSSNavigationFocus(WebFocusType);
     Element* findFocusableElementInShadowHost(const Element& shadowHost);
 
     bool setFocusedElement(Element*, RawPtr<Frame>, const FocusParams&);