Implement sequential focus navigation for OOPIF.

content/browser/frame_host/render_frame_proxy_host.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 CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_PROXY_HOST_H_
 #define CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_PROXY_HOST_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "content/browser/frame_host/render_frame_host_impl.h"
 #include "content/browser/site_instance_impl.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_sender.h"
+#include "third_party/WebKit/public/platform/WebFocusType.h"
 
 struct FrameMsg_PostMessage_Params;
 
 namespace content {
 
 class CrossProcessFrameConnector;
 class FrameTreeNode;
 class RenderProcessHost;
 class RenderFrameHostImpl;
 class RenderViewHostImpl;
@@ skipping 99 matching lines @@
 
   // Returns if the RenderFrameProxy for this host is alive.
   bool is_render_frame_proxy_live() { return render_frame_proxy_created_; }
 
  private:
   // IPC Message handlers.
   void OnDetach();
   void OnOpenURL(const FrameHostMsg_OpenURL_Params& params);
   void OnRouteMessageEvent(const FrameMsg_PostMessage_Params& params);
   void OnDidChangeOpener(int32 opener_routing_id);
+  void OnAdvanceFocus(blink::WebFocusType type, int32_t source_routing_id);
 
   // This RenderFrameProxyHost's routing id.
   int routing_id_;
 
   // The SiteInstance this proxy is associated with.
   scoped_refptr<SiteInstance> site_instance_;
 
   // The renderer process this RenderFrameHostProxy is associated with. It is
   // equivalent to the result of site_instance_->GetProcess(), but that
   // method has the side effect of creating the process if it doesn't exist.
@@ skipping 20 matching lines @@
   // kept alive as long as any RenderFrameHosts or RenderFrameProxyHosts
   // are associated with it.
   RenderViewHostImpl* render_view_host_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameProxyHost);
 };
 
 }  // namespace
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_PROXY_HOST_H_