ASSERT -> DCHECK in core/editing.

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 37 matching lines @@
 
 SurroundingText::SurroundingText(const Position& position, unsigned maxLength)
     : m_startOffsetInContent(0)
     , m_endOffsetInContent(0)
 {
     initialize(position, position, maxLength);
 }
 
 void SurroundingText::initialize(const Position& startPosition, const Position& endPosition, unsigned maxLength)
 {
-    ASSERT(startPosition.document() == endPosition.document());
+    DCHECK_EQ(startPosition.document(), endPosition.document());
 
     const unsigned halfMaxLength = maxLength / 2;
 
     Document* document = startPosition.document();
     // The position will have no document if it is null (as in no position).
     if (!document || !document->documentElement())
         return;
 
     // The forward range starts at the selection end and ends at the document's
     // end. It will then be updated to only contain the text in the text in the
@@ skipping 10 matching lines @@
     // Same as with the forward range but with the backward range. The range
     // starts at the document's start and ends at the selection start and will
     // be updated.
     BackwardsCharacterIterator backwardsIterator(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());
-    ASSERT(m_contentRange);
+    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());
 
-    ASSERT(!iterator.atEnd());
+    DCHECK(!iterator.atEnd());
     iterator.advance(startOffsetInContent);
 
     Position start = iterator.startPosition();
 
-    ASSERT(!iterator.atEnd());
+    DCHECK(!iterator.atEnd());
     iterator.advance(endOffsetInContent - startOffsetInContent);
 
     Position end = iterator.startPosition();
 
-    ASSERT(start.document());
+    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