Replace RenderFullScreen with top layer

Source/core/html/HTMLPlugInElement.cpp

Index: Source/core/html/HTMLPlugInElement.cpp
diff --git a/Source/core/html/HTMLPlugInElement.cpp b/Source/core/html/HTMLPlugInElement.cpp
index 0b2df23c31693eb216d32f4f308cd4248aba55c8..9fe43cc0d199c215aca354dbe07bacb5c08625ee 100644
--- a/Source/core/html/HTMLPlugInElement.cpp
+++ b/Source/core/html/HTMLPlugInElement.cpp
@@ -68,6 +68,7 @@ HTMLPlugInElement::HTMLPlugInElement(const QualifiedName& tagName, Document& doc
     , m_needsWidgetUpdate(!createdByParser)
     , m_shouldPreferPlugInsForImages(preferPlugInsForImagesOption == ShouldPreferPlugInsForImages)
     , m_displayState(Playing)
+    , m_protectWidgetDuringReattach(0)
 {
     setHasCustomStyleCallbacks();
 }
@@ -118,6 +119,16 @@ void HTMLPlugInElement::attach(const AttachContext& context)
 
     if (!renderer() || useFallbackContent())
         return;
+
+    if (m_protectWidgetDuringReattach) {
+        if (RenderEmbeddedObject* object = renderEmbeddedObject()) {
+            setNeedsWidgetUpdate(false);
+            object->setWidget(m_protectWidgetDuringReattach.get());
+        }
+        m_protectWidgetDuringReattach.clear();
+        return;
+    }
+
     if (isImageType()) {
         if (!m_imageLoader)
             m_imageLoader = adoptPtr(new HTMLImageLoader(this));
@@ -144,6 +155,9 @@ void HTMLPlugInElement::updateWidget()
 
 void HTMLPlugInElement::detach(const AttachContext& context)
 {
+    if (context.performingReattach && renderEmbeddedObject())
+        m_protectWidgetDuringReattach = pluginWidget();
+
     // Update the widget the next time we attach (detaching destroys the plugin).
     // FIXME: None of this "needsWidgetUpdate" related code looks right.
     if (renderer() && !useFallbackContent())