Implement Mac Pop-up Dictionary for OOPIF.

third_party/WebKit/public/web/mac/WebSubstringUtil.h

 /*
  * Copyright (C) 2011 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 25 matching lines @@
 
 #if __OBJC__
 @class NSAttributedString;
 #else
 class NSAttributedString;
 #endif
 
 namespace blink {
 
 class WebView;
+class WebWidget;
 struct WebPoint;
 
 class WebSubstringUtil {
 public:
+    // TODO(ekaramad): This method should only receive a WebWidget. But for the
+    // main frame, WebWidget is in fact a WebViewImpl. Since WebViewImpl has
+    // protected inheritance from WebWidget, we cannot downcast further to get
+    // it from its WebWidget reference. This extra parameter will be removed
+    // once WebViewImpl is no longer a WebWidget.
     // Returns an autoreleased NSAttributedString that is the word under
     // the given point, or nil on error.
     // Upon return, |baselinePoint| is set to the left baseline point in
     // AppKit coordinates.
     BLINK_EXPORT static NSAttributedString* attributedWordAtPoint(WebView*,
+        WebWidget*,
         WebPoint,
         WebPoint& baselinePoint);
 
     // Returns an autoreleased NSAttributedString that is a substring of the
     // Frame at the given range, or nil on error.
     BLINK_EXPORT static NSAttributedString* attributedSubstringInRange(WebLocalFrame*,
         size_t location,
         size_t length);
 
     // Returns an autoreleased NSAttributedString that is a substring of the
     // Frame at the given range, or nil on error.
     // It also gets the baseline point for the given range for showing
     // dictionary lookup bubble.
     BLINK_EXPORT static NSAttributedString* attributedSubstringInRange(WebLocalFrame*,
         size_t location,
         size_t length,
         WebPoint* baselinePoint);
 };
 
 } // namespace blink
 
 #endif