Remove the use of WebRange in ContentDetector.

third_party/WebKit/Source/core/editing/SurroundingText.cpp

 /*
  * Copyright (C) 2012 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 71 matching lines @@
     BackwardsCharacterIterator backwardsIterator(Position::firstPositionInNode(document->documentElement()).parentAnchoredEquivalent(), startPosition, TextIteratorStopsOnFormControls);
     if (!backwardsIterator.atEnd())
         backwardsIterator.advance(halfMaxLength);
 
     m_startOffsetInContent = Range::create(*document, backwardsIterator.endPosition(), startPosition)->text().length();
     m_endOffsetInContent = Range::create(*document, backwardsIterator.endPosition(), endPosition)->text().length();
     m_contentRange = Range::create(*document, backwardsIterator.endPosition(), forwardRange.startPosition());
     DCHECK(m_contentRange);
 }
 
-Range* SurroundingText::rangeFromContentOffsets(unsigned startOffsetInContent, unsigned endOffsetInContent)
-{
-    if (startOffsetInContent >= endOffsetInContent || endOffsetInContent > content().length())
-        return nullptr;
-
-    CharacterIterator iterator(m_contentRange->startPosition(), m_contentRange->endPosition());
-
-    DCHECK(!iterator.atEnd());
-    iterator.advance(startOffsetInContent);
-
-    Position start = iterator.startPosition();
-
-    DCHECK(!iterator.atEnd());
-    iterator.advance(endOffsetInContent - startOffsetInContent);
-
-    Position end = iterator.startPosition();
-
-    DCHECK(start.document());
-    return Range::create(*start.document(), start, end);
-}
-
 String SurroundingText::content() const
 {
     if (m_contentRange)
         return m_contentRange->text();
     return String();
 }
 
 unsigned SurroundingText::startOffsetInContent() const
 {
     return m_startOffsetInContent;
 }
 
 unsigned SurroundingText::endOffsetInContent() const
 {
     return m_endOffsetInContent;
 }
 
 } // namespace blink