Extend WebSurroundingText to accept a WebRange.

public/web/WebRange.h

Index: public/web/WebRange.h
diff --git a/public/web/WebRange.h b/public/web/WebRange.h
index cd318a1cf1f110eaae6731975d20ec4be621dead..a8f1043f9d4db736c67197f78a05643c5d5a5fdd 100644
--- a/public/web/WebRange.h
+++ b/public/web/WebRange.h
@@ -81,6 +81,18 @@ public:
     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;
 };