Make Range.detach() a no-op

Source/core/editing/TextIterator.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2005 Alexey Proskuryakov.
  *
  * 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
@@ skipping 2058 matching lines @@
     }
 
     if (!bufferLength)
         return emptyString();
 
     return builder.toString();
 }
 
 static PassRefPtrWillBeRawPtr<Range> collapsedToBoundary(const Range* range, bool forward)
 {
-    RefPtrWillBeRawPtr<Range> result = range->cloneRange(ASSERT_NO_EXCEPTION);
-    result->collapse(!forward, ASSERT_NO_EXCEPTION);
+    RefPtrWillBeRawPtr<Range> result = range->cloneRange();
+    result->collapse(!forward);
     return result.release();
 }
 
 // Check if there's any unpaird surrogate code point.
 // Non-character code points are not checked.
 static bool isValidUTF16(const String& s)
 {
     if (s.is8Bit())
         return true;
     const UChar* ustr = s.characters16();
@@ skipping 104 matching lines @@
             resultEnd = collapseTo;
             return;
         }
     }
 
     CharacterIterator computeRangeIterator(inputStart, inputEnd, iteratorFlagsForFindPlainText);
     calculateCharacterSubrange(computeRangeIterator, matchStart, matchLength, resultStart, resultEnd);
 }
 
 }