DOMTokenList: Update serialization algorithm on add()/remove()

third_party/WebKit/Source/core/dom/DOMTokenList.h

Index: third_party/WebKit/Source/core/dom/DOMTokenList.h
diff --git a/third_party/WebKit/Source/core/dom/DOMTokenList.h b/third_party/WebKit/Source/core/dom/DOMTokenList.h
index 5a51766ae860edbf808b1db912d4cfbae10b79b2..262fc3471b14b800fe4d872ffea377afe7581052 100644
--- a/third_party/WebKit/Source/core/dom/DOMTokenList.h
+++ b/third_party/WebKit/Source/core/dom/DOMTokenList.h
@@ -73,6 +73,7 @@ class CORE_EXPORT DOMTokenList : public GarbageCollectedFinalized<DOMTokenList>,
   virtual void setValue(const AtomicString&);
 
   const SpaceSplitString& Tokens() const { return tokens_; }
+  virtual SpaceSplitString& MutableSet() { return tokens_; }

[kochi, 2017/05/24 05:46:00]

How about moving this to protected: section?

[tkent, 2017/05/24 06:05:34]

It's reasonable.  Done.

   void SetObserver(DOMTokenListObserver* observer) { observer_ = observer; }
 
   const AtomicString& toString() const { return value(); }
@@ -89,10 +90,11 @@ class CORE_EXPORT DOMTokenList : public GarbageCollectedFinalized<DOMTokenList>,
   bool ValidateToken(const String&, ExceptionState&) const;
   bool ValidateTokens(const Vector<String>&, ExceptionState&) const;
   virtual bool ValidateTokenValue(const AtomicString&, ExceptionState&) const;
-  static AtomicString AddToken(const AtomicString&, const AtomicString&);
-  static AtomicString AddTokens(const AtomicString&, const Vector<String>&);
-  static AtomicString RemoveToken(const AtomicString&, const AtomicString&);
-  static AtomicString RemoveTokens(const AtomicString&, const Vector<String>&);
+  AtomicString AddToken(const AtomicString&);
+  AtomicString AddTokens(const Vector<String>&);
+  AtomicString RemoveToken(const AtomicString&);
+  AtomicString RemoveTokens(const Vector<String>&);
+  static AtomicString SerializeSet(const SpaceSplitString&);
 
  private:
   SpaceSplitString tokens_;