blink: Cleanup core class forward declarations

third_party/WebKit/Source/core/dom/DocumentParserTiming.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 DocumentParserTiming_h
 #define DocumentParserTiming_h
 
 #include "core/dom/Document.h"
 #include "platform/Supplementable.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Noncopyable.h"
 
 namespace blink {
 
-class LocalFrame;
 
 // DocumentParserTiming is responsible for tracking parser-related timings for a
 // given document.
 class DocumentParserTiming final
     : public GarbageCollectedFinalized<DocumentParserTiming>,
       public Supplement<Document> {
   WTF_MAKE_NONCOPYABLE(DocumentParserTiming);
   USING_GARBAGE_COLLECTED_MIXIN(DocumentParserTiming);
 
  public:
@@ skipping 84 matching lines @@
   double m_parserBlockedOnScriptExecutionDuration = 0.0;
   double m_parserBlockedOnScriptExecutionFromDocumentWriteDuration = 0.0;
   bool m_parserDetached = false;
 
   Member<Document> m_document;
 };
 
 }  // namespace blink
 
 #endif