Implement sequential focus navigation for OOPIF.

content/browser/frame_host/render_frame_proxy_host.cc

 // 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.
 
 #include "content/browser/frame_host/render_frame_proxy_host.h"
 
 #include "base/lazy_instance.h"
 #include "content/browser/bad_message.h"
 #include "content/browser/frame_host/cross_process_frame_connector.h"
 #include "content/browser/frame_host/frame_tree.h"
@@ skipping 128 matching lines @@
   if (cross_process_frame_connector_.get() &&
       cross_process_frame_connector_->OnMessageReceived(msg))
     return true;
 
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(RenderFrameProxyHost, msg)
     IPC_MESSAGE_HANDLER(FrameHostMsg_Detach, OnDetach)
     IPC_MESSAGE_HANDLER(FrameHostMsg_OpenURL, OnOpenURL)
     IPC_MESSAGE_HANDLER(FrameHostMsg_RouteMessageEvent, OnRouteMessageEvent)
     IPC_MESSAGE_HANDLER(FrameHostMsg_DidChangeOpener, OnDidChangeOpener)
+    IPC_MESSAGE_HANDLER(FrameHostMsg_AdvanceFocus, OnAdvanceFocus)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }
 
 bool RenderFrameProxyHost::InitRenderFrameProxy() {
   DCHECK(!render_frame_proxy_created_);
 
   // It is possible to reach this when the process is dead (in particular, when
   // creating proxies from CreateProxiesForChildFrame).  In that case, don't
@@ skipping 159 matching lines @@
     target_rfh->Send(
         new FrameMsg_PostMessageEvent(target_rfh->GetRoutingID(), new_params));
   }
 }
 
 void RenderFrameProxyHost::OnDidChangeOpener(int32 opener_routing_id) {
   frame_tree_node_->render_manager()->DidChangeOpener(opener_routing_id,
                                                       GetSiteInstance());
 }
 
+void RenderFrameProxyHost::OnAdvanceFocus(blink::WebFocusType type,
+                                          int32_t source_routing_id) {
+  RenderFrameHostImpl* target_rfh =
+      frame_tree_node_->render_manager()->current_frame_host();
+
+  // Translate the source RenderFrameHost in this process to its equivalent
+  // RenderFrameProxyHost in the target process.  This is needed for continuing
+  // the focus traversal from correct place in a parent frame after one of its
+  // child frames finishes its traversal.
+  RenderFrameHostImpl* source_rfh =
+      RenderFrameHostImpl::FromID(GetProcess()->GetID(), source_routing_id);
+  int32_t source_proxy_routing_id = MSG_ROUTING_NONE;
+  if (source_rfh) {
+    RenderFrameProxyHost* source_proxy =
+        source_rfh->frame_tree_node()
+            ->render_manager()
+            ->GetRenderFrameProxyHost(target_rfh->GetSiteInstance());
+    if (source_proxy)
+      source_proxy_routing_id = source_proxy->GetRoutingID();
+  }
+
+  target_rfh->Send(new FrameMsg_AdvanceFocus(target_rfh->GetRoutingID(), type,
+                                             source_proxy_routing_id));
+}
+
 }  // namespace content