Create base class for common functionality of Web{Local,Remote}Frame

third_party/WebKit/public/web/WebFrame.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 45 matching lines @@
 
 namespace blink {
 
 class Frame;
 class OpenedFrameTracker;
 class Visitor;
 class WebData;
 class WebDataSource;
 class WebDocument;
 class WebElement;
+class WebFrameImplBase;
 class WebLayer;
 class WebLocalFrame;
 class WebPerformance;
 class WebRange;
 class WebRemoteFrame;
 class WebSecurityOrigin;
 class WebSharedWorkerRepositoryClient;
 class WebString;
 class WebURL;
 class WebURLLoader;
@@ skipping 596 matching lines @@
     virtual WebRect selectionBoundsRect() const = 0;
 
     // Only for testing purpose:
     // Returns true if selection.anchorNode has a marker on range from |from| with |length|.
     virtual bool selectionStartHasSpellingMarkerFor(int from, int length) const = 0;
 
     // Dumps the layer tree, used by the accelerated compositor, in
     // text form. This is used only by layout tests.
     virtual WebString layerTreeAsText(bool showDebugInfo = false) const = 0;
 
+    virtual WebFrameImplBase* toImplBase() = 0;
+    // TODO(dcheng): Fix const-correctness issues and remove this overload.
+    virtual const WebFrameImplBase* toImplBase() const
+    {
+        return const_cast<WebFrame*>(this)->toImplBase();
+    }
+
     // Returns the frame inside a given frame or iframe element. Returns 0 if
     // the given element is not a frame, iframe or if the frame is empty.
     BLINK_EXPORT static WebFrame* fromFrameOwnerElement(const WebElement&);
 
 #if BLINK_IMPLEMENTATION
     static WebFrame* fromFrame(Frame*);
 
     bool inShadowTree() const { return m_scope == WebTreeScopeType::Shadow; }
 
 #if ENABLE(OILPAN)
@@ skipping 44 matching lines @@
     WebPrivateOwnPtr<OpenedFrameTracker> m_openedFrameTracker;
 };
 
 #if BLINK_IMPLEMENTATION
 Frame* toCoreFrame(const WebFrame*);
 #endif
 
 } // namespace blink
 
 #endif