Implement sequential focus navigation for OOPIF.

third_party/WebKit/Source/core/frame/RemoteFrame.cpp

Index: third_party/WebKit/Source/core/frame/RemoteFrame.cpp
diff --git a/third_party/WebKit/Source/core/frame/RemoteFrame.cpp b/third_party/WebKit/Source/core/frame/RemoteFrame.cpp
index 88ba74565b4c8961e920dd91f3fc55af2e000ec8..1ffac0ecc8102b73d8c09c210bea011e02d64435 100644
--- a/third_party/WebKit/Source/core/frame/RemoteFrame.cpp
+++ b/third_party/WebKit/Source/core/frame/RemoteFrame.cpp
@@ -8,6 +8,7 @@
 #include "bindings/core/v8/WindowProxy.h"
 #include "bindings/core/v8/WindowProxyManager.h"
 #include "core/dom/RemoteSecurityContext.h"
+#include "core/frame/LocalFrame.h"
 #include "core/frame/RemoteDOMWindow.h"
 #include "core/frame/RemoteFrameClient.h"
 #include "core/frame/RemoteFrameView.h"
@@ -179,4 +180,9 @@ void RemoteFrame::setRemotePlatformLayer(WebLayer* layer)
     toHTMLFrameOwnerElement(owner())->setNeedsCompositingUpdate();
 }
 
+void RemoteFrame::advanceFocus(WebFocusType type, LocalFrame* source)
+{
+    remoteFrameClient()->advanceFocus(type, source);
+}
+
 } // namespace blink