blink: Cleanup core class forward declarations

third_party/WebKit/Source/core/editing/iterators/SimplifiedBackwardsTextIterator.h

 /*
  * Copyright (C) 2004, 2006, 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 17 matching lines @@
 
 #include "core/editing/Position.h"
 #include "core/editing/iterators/BackwardsTextBuffer.h"
 #include "core/editing/iterators/FullyClippedStateStack.h"
 #include "core/editing/iterators/TextIteratorFlags.h"
 #include "platform/heap/Heap.h"
 
 namespace blink {
 
 class LayoutText;
-class LayoutTextFragment;
 
 // Iterates through the DOM range, returning all the text, and 0-length
 // boundaries at points where replaced elements break up the text flow. The text
 // comes back in chunks so as to optimize for performance of the iteration.
 template <typename Strategy>
 class CORE_TEMPLATE_CLASS_EXPORT SimplifiedBackwardsTextIteratorAlgorithm {
   STACK_ALLOCATED();
 
  public:
   SimplifiedBackwardsTextIteratorAlgorithm(
@@ skipping 100 matching lines @@
     SimplifiedBackwardsTextIteratorAlgorithm<EditingStrategy>;
 extern template class CORE_EXTERN_TEMPLATE_EXPORT
     SimplifiedBackwardsTextIteratorAlgorithm<EditingInFlatTreeStrategy>;
 
 using SimplifiedBackwardsTextIterator =
     SimplifiedBackwardsTextIteratorAlgorithm<EditingStrategy>;
 
 }  // namespace blink
 
 #endif  // SimplifiedBackwardsTextIterator_h