Remove the use of WebRange in ContentDetector.

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

Index: third_party/WebKit/Source/core/editing/SurroundingText.cpp
diff --git a/third_party/WebKit/Source/core/editing/SurroundingText.cpp b/third_party/WebKit/Source/core/editing/SurroundingText.cpp
index dabea49cae04ca1b8250bf39f5e72de2c9bab100..bb77ee83656705c66d6993fcf8617f0ec3811272 100644
--- a/third_party/WebKit/Source/core/editing/SurroundingText.cpp
+++ b/third_party/WebKit/Source/core/editing/SurroundingText.cpp
@@ -89,27 +89,6 @@ void SurroundingText::initialize(const Position& startPosition, const Position&
     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)