Reduce buggy usage of the registry controlled domain service.

third_party/WebKit/public/platform/WebPublicSuffixList.h

 /*
  * Copyright (C) 2013 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 19 matching lines @@
 
 #ifndef WebPublicSuffixList_h
 #define WebPublicSuffixList_h
 
 #include "public/platform/WebString.h"
 
 namespace blink {
 
 class WebPublicSuffixList {
  public:
-  virtual size_t getPublicSuffixLength(const WebString&) = 0;
+  virtual size_t getPublicSuffixLength(const WebString& canonicalHost) = 0;
 
  protected:
   virtual ~WebPublicSuffixList() {}
 };
 
 }  // namespace blink
 
 #endif  // WebPublicSuffixList_h