Focus plugin on gesturetapdown.

Source/web/WebPluginContainerImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 819 matching lines @@
         return false;
     float absDelta = delta > 0 ? delta : -delta;
     return scrollbarGroup->scroll(delta < 0 ? negativeDirection : positiveDirection, ScrollByPrecisePixel, absDelta);
 }
 
 void WebPluginContainerImpl::handleGestureEvent(GestureEvent* event)
 {
     WebGestureEventBuilder webEvent(this, m_element->renderer(), *event);
     if (webEvent.type == WebInputEvent::Undefined)
         return;
+    if (event->type() == EventTypeNames::gesturetapdown)
+        focusPlugin();
     WebCursorInfo cursorInfo;
     if (m_webPlugin->handleInputEvent(webEvent, cursorInfo)) {
         event->setDefaultHandled();
         return;
     }
 
     if (webEvent.type == WebInputEvent::GestureScrollUpdate || webEvent.type == WebInputEvent::GestureScrollUpdateWithoutPropagation) {
         if (!m_scrollbarGroup)
             return;
         if (gestureScrollHelper(m_scrollbarGroup.get(), ScrollLeft, ScrollRight, webEvent.data.scrollUpdate.deltaX))
@@ skipping 59 matching lines @@
 
     return clipRect;
 }
 
 bool WebPluginContainerImpl::pluginShouldPersist() const
 {
     return m_webPlugin->shouldPersist();
 }
 
 } // namespace blink