Extend WebSurroundingText to accept a WebRange.

public/web/WebRange.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 63 matching lines @@
 
     BLINK_EXPORT static WebRange fromDocumentRange(WebLocalFrame*, int start, int length);
 
     BLINK_EXPORT WebVector<WebFloatQuad> textQuads() const;
 
 #if BLINK_IMPLEMENTATION
     WebRange(const PassRefPtrWillBeRawPtr<WebCore::Range>&);
     operator PassRefPtrWillBeRawPtr<WebCore::Range>() const;
 #endif
 
+#if BLINK_IMPLEMENTATION
+    template<typename T> T* unwrap()

[tkent, 2014/06/13 01:15:37]

You don't need it.
We already have |operator PassRefPtrWillBeRawPtr<>()|.  You can get a Rage
object with:
    RefPtrWillBeRawPtr<Range> range = static_cast<PassRefPtrWillBeRawPtr<Range>
>(webRange);

WebNode and WebDOMEvent need it because storage type and wanted type are
mismatched. e.g. The storage of WebDocument is WebPrivatePtr<Node> inherited
from WebNode, but WebDocument needs Document* instead of Node*.

[mlamouri (slow - plz ping), 2014/06/13 10:34:03]

Done.

+    {
+        return static_cast<T*>(m_private.get());
+    }
+
+    template<typename T> const T* constUnwrap() const
+    {
+        return static_cast<const T*>(m_private.get());
+    }
+#endif
+
 private:
     WebPrivatePtr<WebCore::Range> m_private;
 };
 
 } // namespace blink
 
 #endif