Replace ASSERT with DCHECK in core/

third_party/WebKit/Source/core/clipboard/Pasteboard.cpp

 /*
  * 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 55 matching lines @@
   ReplaceNewlinesWithWindowsStyleNewlines(plain_text);
   Platform::Current()->Clipboard()->WritePlainText(plain_text);
 #else
   Platform::Current()->Clipboard()->WritePlainText(text);
 #endif
 }
 
 void Pasteboard::WriteImage(Image* image,
                             const KURL& url,
                             const String& title) {
-  ASSERT(image);
+  DCHECK(image);
 
   const WebImage web_image(image);
   if (web_image.IsNull())
     return;
 
   Platform::Current()->Clipboard()->WriteImage(web_image, WebURL(url),
                                                WebString(title));
 }
 
 void Pasteboard::WriteDataObject(DataObject* data_object) {
@@ skipping 40 matching lines @@
 #if OS(WIN)
   ReplaceNewlinesWithWindowsStyleNewlines(text);
 #endif
   ReplaceNBSPWithSpace(text);
 
   Platform::Current()->Clipboard()->WriteHTML(markup, document_url, text,
                                               can_smart_copy_or_delete);
 }
 
 }  // namespace blink