[Experimental] Implement some part of custom properties in style maps

third_party/WebKit/Source/core/css/cssom/StylePropertyMap.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef StylePropertyMap_h
 #define StylePropertyMap_h
 
 #include "bindings/core/v8/CSSStyleValueOrCSSStyleValueSequence.h"
 #include "bindings/core/v8/CSSStyleValueOrCSSStyleValueSequenceOrString.h"
 #include "bindings/core/v8/Iterable.h"
@@ skipping 43 matching lines @@
                       CSSStyleValueOrCSSStyleValueSequenceOrString& item,
                       ExceptionState&) = 0;
   virtual void remove(CSSPropertyID, ExceptionState&) = 0;
 
   DEFINE_INLINE_VIRTUAL_TRACE() {}
 
  protected:
   StylePropertyMap() {}
 
   virtual CSSStyleValueVector getAllInternal(CSSPropertyID) = 0;
-  virtual CSSStyleValueVector getAllInternal(
-      AtomicString customPropertyName) = 0;
+  virtual CSSStyleValueVector getAllInternal(String customPropertyName) = 0;
 
   virtual HeapVector<StylePropertyMapEntry> getIterationEntries() = 0;
   IterationSource* startIteration(ScriptState*, ExceptionState&) override;
 };
 
 }  // namespace blink
 
 #endif