Implement sequential focus navigation for OOPIF.

third_party/WebKit/Source/web/RemoteFrameClientImpl.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef RemoteFrameClientImpl_h
 #define RemoteFrameClientImpl_h
 
 #include "core/frame/RemoteFrameClient.h"
 
 namespace blink {
@@ skipping 18 matching lines @@
     Frame* firstChild() const override;
     Frame* lastChild() const override;
     bool willCheckAndDispatchMessageEvent(SecurityOrigin*, MessageEvent*, LocalFrame*) const override;
 
     // RemoteFrameClient overrides:
     void navigate(const ResourceRequest&, bool shouldReplaceCurrentEntry) override;
     void reload(FrameLoadType, ClientRedirectPolicy) override;
     unsigned backForwardLength() override;
     void forwardInputEvent(Event*) override;
     void frameRectsChanged(const IntRect& frameRect) override;
+    void advanceFocus(WebFocusType, LocalFrame*) override;
 
     WebRemoteFrameImpl* webFrame() const { return m_webFrame; }
 
 private:
     explicit RemoteFrameClientImpl(WebRemoteFrameImpl*);
 
     RawPtrWillBeMember<WebRemoteFrameImpl> m_webFrame;
 };
 
 } // namespace blink
 
 #endif // RemoteFrameClientImpl_h