Merge RenderWidget into single subclass, RenderPart

Source/core/html/HTMLEmbedElement.cpp

Index: Source/core/html/HTMLEmbedElement.cpp
diff --git a/Source/core/html/HTMLEmbedElement.cpp b/Source/core/html/HTMLEmbedElement.cpp
index 5d49a4802c748c23f3830a498821b2e2c158af78..7083867333d41bf1038b7ae806467460310adf8d 100644
--- a/Source/core/html/HTMLEmbedElement.cpp
+++ b/Source/core/html/HTMLEmbedElement.cpp
@@ -34,7 +34,7 @@
 #include "core/html/PluginDocument.h"
 #include "core/html/parser/HTMLParserIdioms.h"
 #include "core/rendering/RenderEmbeddedObject.h"
-#include "core/rendering/RenderWidget.h"
+#include "core/rendering/RenderPart.h"
 
 namespace blink {
 
@@ -52,20 +52,20 @@ PassRefPtrWillBeRawPtr<HTMLEmbedElement> HTMLEmbedElement::create(Document& docu
     return element.release();
 }
 
-static inline RenderWidget* findWidgetRenderer(const Node* n)
+static inline RenderPart* findPartRenderer(const Node* n)
 {
     if (!n->renderer())
         n = Traversal<HTMLObjectElement>::firstAncestor(*n);
 
-    if (n && n->renderer() && n->renderer()->isWidget())
-        return toRenderWidget(n->renderer());
+    if (n && n->renderer() && n->renderer()->isRenderPart())
+        return toRenderPart(n->renderer());
 
     return 0;
 }
 
-RenderWidget* HTMLEmbedElement::existingRenderWidget() const
+RenderPart* HTMLEmbedElement::existingRenderPart() const
 {
-    return findWidgetRenderer(this);
+    return findPartRenderer(this);
 }
 
 bool HTMLEmbedElement::isPresentationAttribute(const QualifiedName& name) const