Reland: Generate separate files for union type containers

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/Iterable.h"
 #include "bindings/core/v8/ScriptWrappable.h"
-#include "bindings/core/v8/UnionTypesCore.h"
+#include "bindings/core/v8/StyleValueOrStyleValueSequence.h"
+#include "bindings/core/v8/StyleValueOrStyleValueSequenceOrString.h"
 #include "core/CSSPropertyNames.h"
 #include "core/CoreExport.h"
 #include "core/css/cssom/StyleValue.h"
 
 namespace blink {
 
 class ExceptionState;
 
 class CORE_EXPORT StylePropertyMap : public GarbageCollectedFinalized<StylePropertyMap>, public ScriptWrappable, public PairIterable<String, StyleValueOrStyleValueSequence> {
     WTF_MAKE_NONCOPYABLE(StylePropertyMap);
@@ skipping 27 matching lines @@
 protected:
     StylePropertyMap() { }
 
     IterationSource* startIteration(ScriptState*, ExceptionState&) override { return nullptr; }
     StyleValueVector cssValueToStyleValueVector(CSSPropertyID, const CSSValue&);
 };
 
 } // namespace blink
 
 #endif