Set plugin focus by implementing HTMLPlugInElement::SetFocused.

third_party/WebKit/Source/core/html/HTMLPlugInElement.cpp

 /**
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Stefan Schimanski (1Stein@gmx.de)
  * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 137 matching lines @@
 void HTMLPlugInElement::SetPersistedPlugin(PluginView* plugin) {
   if (persisted_plugin_ == plugin)
     return;
   if (persisted_plugin_) {
     persisted_plugin_->Hide();
     DisposeWidgetSoon(persisted_plugin_.Release());
   }
   persisted_plugin_ = plugin;
 }
 
+void HTMLPlugInElement::SetFocused(bool focused, WebFocusType focus_type) {
+  if (plugin_)
+    plugin_->SetFocused(focused, focus_type);
+  HTMLFrameOwnerElement::SetFocused(focused, focus_type);
+}
+
 bool HTMLPlugInElement::RequestObjectInternal(
     const String& url,
     const String& mime_type,
     const Vector<String>& param_names,
     const Vector<String>& param_values) {
   if (url.IsEmpty() && mime_type.IsEmpty())
     return false;
 
   if (ProtocolIsJavaScript(url))
     return false;
@@ skipping 531 matching lines @@
 
 void HTMLPlugInElement::LazyReattachIfNeeded() {
   if (!UseFallbackContent() && NeedsPluginUpdate() && GetLayoutObject() &&
       !IsImageType()) {
     LazyReattachIfAttached();
     SetPersistedPlugin(nullptr);
   }
 }
 
 }  // namespace blink