fetch: Drop Headers from HeadersInit typedef declaration.

third_party/WebKit/Source/modules/fetch/RequestInit.cpp

 // 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.
 
 #include "modules/fetch/RequestInit.h"
 
 #include "bindings/core/v8/Dictionary.h"
 #include "bindings/core/v8/V8ArrayBuffer.h"
 #include "bindings/core/v8/V8ArrayBufferView.h"
 #include "bindings/core/v8/V8BindingForCore.h"
@@ skipping 88 matching lines @@
       } else {
         exception_state.ThrowTypeError("Invalid referrer policy");
         return;
       }
     }
   }
 
   v8::Isolate* isolate = ToIsolate(context);
 
   if (is_header_set) {
-    V8ByteStringSequenceSequenceOrByteStringByteStringRecordOrHeaders::toImpl(
+    V8ByteStringSequenceSequenceOrByteStringByteStringRecord::toImpl(
         isolate, v8_headers, headers, UnionTypeConversionMode::kNotNullable,
         exception_state);
     if (exception_state.HadException())
       return;
   }
 
   if (is_credential_set) {
     if (V8PasswordCredential::hasInstance(v8_credential, isolate)) {
       // TODO(mkwst): According to the spec, we'd serialize this once we touch
       // the network. We're serializing it here, ahead of time, because lifetime
@@ skipping 43 matching lines @@
         AtomicString("application/x-www-form-urlencoded;charset=UTF-8");
     body = new FormDataBytesConsumer(context, form_data.Release());
   } else if (v8_body->IsString()) {
     content_type = "text/plain;charset=UTF-8";
     body = new FormDataBytesConsumer(
         ToUSVString(isolate, v8_body, exception_state));
   }
 }
 
 }  // namespace blink