Avoid style clobbering in setCompositionFromExistingText. (2nd land)

Source/core/editing/markers/DocumentMarkerController.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 45 matching lines @@
 class CORE_EXPORT DocumentMarkerController final : public NoBaseWillBeGarbageCollected<DocumentMarkerController> {
     WTF_MAKE_NONCOPYABLE(DocumentMarkerController); WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(DocumentMarkerController);
     DECLARE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(DocumentMarkerController);
 public:
 
     DocumentMarkerController();
 
     void clear();
     void addMarker(const Position& start, const Position& end, DocumentMarker::MarkerType, const String& description = emptyString(), uint32_t hash = 0);
     void addTextMatchMarker(const Range*, bool activeMatch);
+    void addCompositionMarker(const Position& start, const Position& end, Color underlineColor, bool thick, Color backgroundColor);
 
     void copyMarkers(Node* srcNode, unsigned startOffset, int length, Node* dstNode, int delta);
 
     void prepareForDestruction();
     // When a marker partially overlaps with range, if removePartiallyOverlappingMarkers is true, we completely
     // remove the marker. If the argument is false, we will adjust the span of the marker so that it retains
     // the portion that is outside of the range.
     enum RemovePartiallyOverlappingMarkerOrNot { DoNotRemovePartiallyOverlappingMarker, RemovePartiallyOverlappingMarker };
     void removeMarkers(const EphemeralRange&, DocumentMarker::MarkerTypes = DocumentMarker::AllMarkers(), RemovePartiallyOverlappingMarkerOrNot = DoNotRemovePartiallyOverlappingMarker);
     void removeMarkers(Node*, unsigned startOffset, int length, DocumentMarker::MarkerTypes = DocumentMarker::AllMarkers(),  RemovePartiallyOverlappingMarkerOrNot = DoNotRemovePartiallyOverlappingMarker);
@@ skipping 36 matching lines @@
     DocumentMarker::MarkerTypes m_possiblyExistingMarkerTypes;
 };
 
 } // namespace blink
 
 #ifndef NDEBUG
 void showDocumentMarkers(const blink::DocumentMarkerController*);
 #endif
 
 #endif // DocumentMarkerController_h