Use isHTMLPlugInElement to replace checks

Source/core/dom/Element.cpp

Index: Source/core/dom/Element.cpp
diff --git a/Source/core/dom/Element.cpp b/Source/core/dom/Element.cpp
index f7f3bf246f50a5e5fea9f46822a0c17bea0c7030..e8a1a598f7eb8bfb67a847de39e337722029ec65 100644
--- a/Source/core/dom/Element.cpp
+++ b/Source/core/dom/Element.cpp
@@ -90,6 +90,7 @@
 #include "core/html/HTMLFrameElementBase.h"
 #include "core/html/HTMLFrameOwnerElement.h"
 #include "core/html/HTMLOptionsCollection.h"
+#include "core/html/HTMLPlugInElement.h"
 #include "core/html/HTMLTableRowsCollection.h"
 #include "core/html/HTMLTemplateElement.h"
 #include "core/html/parser/HTMLParserIdioms.h"
@@ -3322,11 +3323,7 @@ bool Element::supportsStyleSharing() const
     // Turn off style sharing for elements that can gain layers for reasons outside of the style system.
     // See comments in RenderObject::setStyle().
     // FIXME: Why does gaining a layer from outside the style system require disabling sharing?
-    if (isHTMLFrameElementBase(*this)
-        || isHTMLEmbedElement(*this)
-        || isHTMLObjectElement(*this)
-        || isHTMLAppletElement(*this)
-        || isHTMLCanvasElement(*this))
+    if (isHTMLFrameElementBase(*this) || isHTMLPlugInElement(*this) || isHTMLCanvasElement(*this))
         return false;
     if (FullscreenElementStack::isActiveFullScreenElement(*this))
         return false;