Implement sequential focus navigation for OOPIF.

third_party/WebKit/Source/core/frame/RemoteFrameClient.h

Index: third_party/WebKit/Source/core/frame/RemoteFrameClient.h
diff --git a/third_party/WebKit/Source/core/frame/RemoteFrameClient.h b/third_party/WebKit/Source/core/frame/RemoteFrameClient.h
index 50d88f88ac63e1f0287a201abc30773e7d1b3017..7beb80af43cd0b3951c9ae5a30a0fde450ca04d2 100644
--- a/third_party/WebKit/Source/core/frame/RemoteFrameClient.h
+++ b/third_party/WebKit/Source/core/frame/RemoteFrameClient.h
@@ -8,6 +8,7 @@
 #include "core/frame/FrameClient.h"
 #include "core/frame/FrameTypes.h"
 #include "core/loader/FrameLoaderTypes.h"
+#include "public/platform/WebFocusType.h"
 
 namespace blink {
 
@@ -28,6 +29,8 @@ public:
     virtual void forwardInputEvent(Event*) = 0;
 
     virtual void frameRectsChanged(const IntRect& frameRect) = 0;
+
+    virtual void advanceFocus(WebFocusType, LocalFrame* source) = 0;
 };
 
 } // namespace blink