Merge RenderWidget into single subclass, RenderPart

Source/core/html/HTMLPlugInElement.h

Index: Source/core/html/HTMLPlugInElement.h
diff --git a/Source/core/html/HTMLPlugInElement.h b/Source/core/html/HTMLPlugInElement.h
index b03a5462abaf9c19f940833026c05d4d37b21eec..505575d2f516fd1da8743fa8cf38e0b8b1847d90 100644
--- a/Source/core/html/HTMLPlugInElement.h
+++ b/Source/core/html/HTMLPlugInElement.h
@@ -33,7 +33,7 @@ namespace blink {
 
 class HTMLImageLoader;
 class RenderEmbeddedObject;
-class RenderWidget;
+class RenderPart;
 class Widget;
 
 enum PreferPlugInsForImagesOption {
@@ -78,9 +78,9 @@ protected:
 
     virtual bool hasFallbackContent() const;
     virtual bool useFallbackContent() const;
-    // Create or update the RenderWidget and return it, triggering layout if
+    // Create or update the RenderPart and return it, triggering layout if
     // necessary.
-    virtual RenderWidget* renderWidgetForJSBindings() const;
+    virtual RenderPart* renderPartForJSBindings() const;
 
     bool isImageType();
     bool shouldPreferPlugInsForImages() const { return m_shouldPreferPlugInsForImages; }
@@ -122,9 +122,9 @@ private:
     virtual bool hasCustomFocusLogic() const OVERRIDE;
     virtual bool isPluginElement() const OVERRIDE FINAL;
 
-    // Return any existing RenderWidget without triggering relayout, or 0 if it
+    // Return any existing RenderPart without triggering relayout, or 0 if it
     // doesn't yet exist.
-    virtual RenderWidget* existingRenderWidget() const = 0;
+    virtual RenderPart* existingRenderPart() const = 0;
     virtual void updateWidgetInternal() = 0;
 
     bool loadPlugin(const KURL&, const String& mimeType, const Vector<String>& paramNames, const Vector<String>& paramValues, bool useFallback, bool requireRenderer);