Clean up cloud printing aura stub code.

printing/printed_document.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "printing/printed_document.h"
 
 #include <algorithm>
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 212 matching lines @@
                                       int cookie)
     : settings_(settings),
       source_message_loop_(MessageLoop::current()),
       name_(source->RenderSourceName()),
       cookie_(cookie) {
 }
 
 PrintedDocument::Immutable::~Immutable() {
 }
 
+#if defined(OS_POSIX) && defined(USE_AURA)
+// This function is not used on aura linux/chromeos.
+void PrintedDocument::RenderPrintedPage(const PrintedPage& page,
+                                        PrintingContext* context) const {
+}
+#endif
+
 }  // namespace printing