ASSERT -> DCHECK in core/editing.

third_party/WebKit/Source/core/editing/commands/BreakBlockquoteCommand.cpp

 /*
  * Copyright (C) 2005 Apple Computer, 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 69 matching lines @@
     // Delete the current selection.
     if (endingSelection().isRange()) {
         deleteSelection(editingState, false, false);
         if (editingState->isAborted())
             return;
     }
 
     // This is a scenario that should never happen, but we want to
     // make sure we don't dereference a null pointer below.
 
-    ASSERT(!endingSelection().isNone());
+    DCHECK(!endingSelection().isNone());
 
     if (endingSelection().isNone())
         return;
 
     VisiblePosition visiblePos = endingSelection().visibleStart();
 
     // pos is a position equivalent to the caret.  We use downstream() so that pos will
     // be in the first node that we need to move (there are a few exceptions to this, see below).
     Position pos = mostForwardCaretPosition(endingSelection().start());
 
@@ skipping 35 matching lines @@
         pos = nextPositionOf(pos, PositionMoveType::GraphemeCluster);
     }
 
     // Adjust the position so we don't split at the beginning of a quote.
     while (isFirstVisiblePositionInNode(createVisiblePosition(pos), toHTMLQuoteElement(enclosingNodeOfType(pos, isMailHTMLBlockquoteElement)))) {
         pos = previousPositionOf(pos, PositionMoveType::GraphemeCluster);
     }
 
     // startNode is the first node that we need to move to the new blockquote.
     Node* startNode = pos.anchorNode();
-    ASSERT(startNode);
+    DCHECK(startNode);
 
     // Split at pos if in the middle of a text node.
     if (startNode->isTextNode()) {
         Text* textNode = toText(startNode);
         int textOffset = pos.computeOffsetInContainerNode();
         if ((unsigned)textOffset >= textNode->length()) {
             startNode = NodeTraversal::next(*startNode);
-            ASSERT(startNode);
+            DCHECK(startNode);
         } else if (textOffset > 0) {
             splitTextNode(textNode, textOffset);
         }
     } else if (pos.computeEditingOffset() > 0) {
         Node* childAtOffset = NodeTraversal::childAt(*startNode, pos.computeEditingOffset());
         startNode = childAtOffset ? childAtOffset : NodeTraversal::next(*startNode);
-        ASSERT(startNode);
+        DCHECK(startNode);
     }
 
     // If there's nothing inside topBlockquote to move, we're finished.
     if (!startNode->isDescendantOf(topBlockquote)) {
         setEndingSelection(VisibleSelection(createVisiblePosition(firstPositionInOrBeforeNode(startNode)), endingSelection().isDirectional()));
         return;
     }
 
     // Build up list of ancestors in between the start node and the top blockquote.
     HeapVector<Member<Element>> ancestors;
@@ skipping 62 matching lines @@
     addBlockPlaceholderIfNeeded(clonedBlockquote, editingState);
     if (editingState->isAborted())
         return;
 
     // Put the selection right before the break.
     setEndingSelection(VisibleSelection(positionBeforeNode(breakElement), TextAffinity::Downstream, endingSelection().isDirectional()));
     rebalanceWhitespace();
 }
 
 } // namespace blink