Fetch: Make Headers' constructor match the current spec IDL.

third_party/WebKit/Source/modules/fetch/Headers.h

 // Copyright 2014 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 Headers_h
 #define Headers_h
 
 #include "bindings/core/v8/Iterable.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "modules/ModulesExport.h"
 #include "modules/fetch/FetchHeaderList.h"
 #include "wtf/Forward.h"
 
 namespace blink {
 
+class ByteStringSequenceSequenceOrDictionaryOrHeaders;
 class Dictionary;
 class ExceptionState;
 
 // http://fetch.spec.whatwg.org/#headers-class
 class MODULES_EXPORT Headers final : public GarbageCollected<Headers>,
                                      public ScriptWrappable,
                                      public PairIterable<String, String> {
   DEFINE_WRAPPERTYPEINFO();
 
  public:
   enum Guard {
     ImmutableGuard,
     RequestGuard,
     RequestNoCORSGuard,
     ResponseGuard,
     NoneGuard
   };
 
-  static Headers* create();
   static Headers* create(ExceptionState&);
-  static Headers* create(const Headers*, ExceptionState&);
-  static Headers* create(const Vector<Vector<String>>&, ExceptionState&);
-  static Headers* create(const Dictionary&, ExceptionState&);
+  static Headers* create(const ByteStringSequenceSequenceOrDictionaryOrHeaders&,
+                         ExceptionState&);
 
   // Shares the FetchHeaderList. Called when creating a Request or Response.
   static Headers* create(FetchHeaderList*);
 
   Headers* clone() const;
 
   // Headers.idl implementation.
   void append(const String& name, const String& value, ExceptionState&);
   void remove(const String& key, ExceptionState&);
   String get(const String& key, ExceptionState&);
@@ skipping 19 matching lines @@
 
   Member<FetchHeaderList> m_headerList;
   Guard m_guard;
 
   IterationSource* startIteration(ScriptState*, ExceptionState&) override;
 };
 
 }  // namespace blink
 
 #endif  // Headers_h