Replace ASSERT with DCHECK in core/

third_party/WebKit/Source/core/clipboard/DataObject.h

 /*
  * Copyright (c) 2008, 2009, 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 80 matching lines @@
   Vector<String> Filenames() const;
   void AddFilename(const String& filename,
                    const String& display_name,
                    const String& file_system_id);
 
   // Used for dragging in filesystem from the desktop.
   void SetFilesystemId(const String& file_system_id) {
     filesystem_id_ = file_system_id;
   }
   const String& FilesystemId() const {
-    ASSERT(!filesystem_id_.IsEmpty());
+    DCHECK(!filesystem_id_.IsEmpty());
     return filesystem_id_;
   }
 
   // Used to handle files (images) being dragged out.
   void AddSharedBuffer(PassRefPtr<SharedBuffer>,
                        const KURL&,
                        const String& filename_extension,
                        const AtomicString& content_disposition);
 
   int GetModifiers() const { return modifiers_; }
@@ skipping 13 matching lines @@
   HeapVector<Member<DataObjectItem>> item_list_;
 
   // State of Shift/Ctrl/Alt/Meta keys and Left/Right/Middle mouse buttons
   int modifiers_;
   String filesystem_id_;
 };
 
 }  // namespace blink
 
 #endif