Browser Plugin: Plumbing to enable tabbing out of a browser tag

content/renderer/browser_plugin/browser_plugin_channel_manager.cc

Index: content/renderer/browser_plugin/browser_plugin_channel_manager.cc
diff --git a/content/renderer/browser_plugin/browser_plugin_channel_manager.cc b/content/renderer/browser_plugin/browser_plugin_channel_manager.cc
index 678af1c6c8b001c5cd4bf8ef2e10aa1c97995c24..0a49e9d9c070af0dbb7597bfcc73c28b1202b324 100644
--- a/content/renderer/browser_plugin/browser_plugin_channel_manager.cc
+++ b/content/renderer/browser_plugin/browser_plugin_channel_manager.cc
@@ -89,6 +89,7 @@ bool BrowserPluginChannelManager::OnControlMessageReceived(
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(BrowserPluginChannelManager, message)
     IPC_MESSAGE_HANDLER(BrowserPluginMsg_LoadGuest, OnLoadGuest)
+    IPC_MESSAGE_HANDLER(BrowserPluginMsg_AdvanceFocus, OnAdvanceFocus)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
 
@@ -134,4 +135,10 @@ void BrowserPluginChannelManager::OnLoadGuest(
   browser_plugin->LoadGuest(guest_process_id, channel_handle);
 }
 
+void BrowserPluginChannelManager::OnAdvanceFocus(int instance_id,
+                                                 bool reverse) {
+  BrowserPlugin* browser_plugin = BrowserPlugin::FromID(instance_id);
+  browser_plugin->AdvanceFocus(reverse);
+}
+
 }  // namespace content