ASSERT -> DCHECK in core/editing.

third_party/WebKit/Source/core/editing/PlainTextRange.h

 /*
  * Copyright (C) 2006, 2007, 2008 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 28 matching lines @@
 class Range;
 
 class CORE_EXPORT PlainTextRange {
     STACK_ALLOCATED();
 public:
     PlainTextRange();
     PlainTextRange(const PlainTextRange&);
     explicit PlainTextRange(int location);
     PlainTextRange(int start, int end);
 
-    size_t end() const { ASSERT(!isNull()); return m_end; }
-    size_t start() const { ASSERT(!isNull()); return m_start; }
+    size_t end() const { DCHECK(isNotNull()); return m_end; }
+    size_t start() const { DCHECK(isNotNull()); return m_start; }
     bool isNull() const { return m_start == kNotFound; }
     bool isNotNull() const { return m_start != kNotFound; }
-    size_t length() const { ASSERT(!isNull()); return m_end - m_start; }
+    size_t length() const { DCHECK(isNotNull()); return m_end - m_start; }
 
     EphemeralRange createRange(const ContainerNode& scope) const;
     EphemeralRange createRangeForSelection(const ContainerNode& scope) const;
 
     static PlainTextRange create(const ContainerNode& scope, const EphemeralRange&);
     static PlainTextRange create(const ContainerNode& scope, const Range&);
 
 private:
     PlainTextRange& operator=(const PlainTextRange&) = delete;
 
     enum GetRangeFor { ForGeneric, ForSelection };
     EphemeralRange createRangeFor(const ContainerNode& scope, GetRangeFor) const;
 
     const size_t m_start;
     const size_t m_end;
 };
 
 } // namespace blink
 
 #endif // PlainTextRange_h