Remove RenderFrameBase.

Source/core/rendering/RenderFrame.h

Index: Source/core/rendering/RenderFrame.h
diff --git a/Source/core/rendering/RenderFrame.h b/Source/core/rendering/RenderFrame.h
index dd2c48301d33b8db8482a9b17f4c8170c036cdfa..848b9257b8257f0f33e3b54696d683b49a47642a 100644
--- a/Source/core/rendering/RenderFrame.h
+++ b/Source/core/rendering/RenderFrame.h
@@ -23,14 +23,14 @@
 #ifndef RenderFrame_h
 #define RenderFrame_h
 
-#include "core/rendering/RenderFrameBase.h"
 #include "core/rendering/RenderFrameSet.h"
+#include "core/rendering/RenderPart.h"
 
 namespace WebCore {
 
 class HTMLFrameElement;
 
-class RenderFrame FINAL : public RenderFrameBase {
+class RenderFrame FINAL : public RenderPart {
 public:
     explicit RenderFrame(HTMLFrameElement*);