ASSERT -> DCHECK in core/editing.

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

 /*
  * Copyright (C) 2005, 2006, 2007 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 20 matching lines @@
 #include "core/editing/commands/CompositeEditCommand.h"
 #include "core/frame/LocalFrame.h"
 #include "core/layout/LayoutText.h"
 
 namespace blink {
 
 EditCommand::EditCommand(Document& document)
     : m_document(&document)
     , m_parent(nullptr)
 {
-    ASSERT(m_document);
-    ASSERT(m_document->frame());
+    DCHECK(m_document);
+    DCHECK(m_document->frame());
     setStartingSelection(m_document->frame()->selection().selection());
     setEndingSelection(m_startingSelection);
 }
 
 EditCommand::~EditCommand()
 {
 }
 
 EditAction EditCommand::editingAction() const
 {
     return EditActionUnspecified;
 }
 
 static inline EditCommandComposition* compositionIfPossible(EditCommand* command)
 {
     if (!command->isCompositeEditCommand())
         return 0;
     return toCompositeEditCommand(command)->composition();
 }
 
 void EditCommand::setStartingSelection(const VisibleSelection& selection)
 {
     for (EditCommand* command = this; ; command = command->m_parent) {
         if (EditCommandComposition* composition = compositionIfPossible(command)) {
-            ASSERT(command->isTopLevelCommand());
+            DCHECK(command->isTopLevelCommand());
             composition->setStartingSelection(selection);
         }
         command->m_startingSelection = selection;
         if (!command->m_parent || command->m_parent->isFirstCommand(command))
             break;
     }
 }
 
 void EditCommand::setEndingSelection(const VisibleSelection& selection)
 {
     for (EditCommand* command = this; command; command = command->m_parent) {
         if (EditCommandComposition* composition = compositionIfPossible(command)) {
-            ASSERT(command->isTopLevelCommand());
+            DCHECK(command->isTopLevelCommand());
             composition->setEndingSelection(selection);
         }
         command->m_endingSelection = selection;
     }
 }
 
 void EditCommand::setEndingSelection(const VisiblePosition& position)
 {
     setEndingSelection(VisibleSelection(position));
 }
 
 bool EditCommand::isRenderedCharacter(const Position& position)
 {
     if (position.isNull())
         return false;
-    ASSERT(position.isOffsetInAnchor());
+    DCHECK(position.isOffsetInAnchor());

[yosin_UTC9, 2016/04/14 04:35:02]

How about adding |<< position|?

     if (!position.anchorNode()->isTextNode())
         return false;
 
     LayoutObject* layoutObject = position.anchorNode()->layoutObject();
     if (!layoutObject)
         return false;
 
     return toLayoutText(layoutObject)->isRenderedCharacter(position.offsetInContainerNode());
 }
 
 void EditCommand::setParent(CompositeEditCommand* parent)
 {
-    ASSERT((parent && !m_parent) || (!parent && m_parent));
-    ASSERT(!parent || !isCompositeEditCommand() || !toCompositeEditCommand(this)->composition());
+    DCHECK((parent && !m_parent) || (!parent && m_parent));
+    DCHECK(!parent || !isCompositeEditCommand() || !toCompositeEditCommand(this)->composition());
     m_parent = parent;
     if (parent) {
         m_startingSelection = parent->m_endingSelection;
         m_endingSelection = parent->m_endingSelection;
     }
 }
 
 void SimpleEditCommand::doReapply()
 {
     EditingState editingState;
     doApply(&editingState);
 }
 
 DEFINE_TRACE(EditCommand)
 {
     visitor->trace(m_document);
     visitor->trace(m_startingSelection);
     visitor->trace(m_endingSelection);
     visitor->trace(m_parent);
 }
 
 } // namespace blink