Remove some dead scrolling paths and unused params

public/web/WebWidgetClient.h

Index: public/web/WebWidgetClient.h
diff --git a/public/web/WebWidgetClient.h b/public/web/WebWidgetClient.h
index 63a0e62e14968c4224fc880d603188105633e19d..c71f005b6f6107c606aa6203cff7e1dc202dea6f 100644
--- a/public/web/WebWidgetClient.h
+++ b/public/web/WebWidgetClient.h
@@ -51,10 +51,6 @@ public:
     // Called when a region of the WebWidget needs to be re-painted.
     virtual void didInvalidateRect(const WebRect&) { }
 
-    // Called when a region of the WebWidget, given by clipRect, should be
-    // scrolled by the specified dx and dy amounts.
-    virtual void didScrollRect(int dx, int dy, const WebRect& clipRect) { }

[Ian Vollick, 2014/06/23 15:07:58]

I'm not sure when it disappeared, but there's no def'n of didScrollRect that
actually does anything, so I started unravelling things.

-
     // Called when the Widget has changed size as a result of an auto-resize.
     virtual void didAutoResize(const WebSize& newSize) { }