Make Resource::resourceBuffer() to return PassRefPtr<const SharedBuffer>

third_party/WebKit/Source/platform/mhtml/MHTMLArchive.cpp

 /*
  * Copyright (C) 2011 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 49 matching lines @@
         else
             stringBuilder.append('?');
     }
     return stringBuilder.toString();
 }
 
 MHTMLArchive::MHTMLArchive()
 {
 }
 
-MHTMLArchive* MHTMLArchive::create(const KURL& url, PassRefPtr<SharedBuffer> data)
+MHTMLArchive* MHTMLArchive::create(const KURL& url, PassRefPtr<const SharedBuffer> data)
 {
     // MHTML pages can only be loaded from local URLs, http/https URLs, and content URLs(Android specific).
     // The latter is now allowed due to full sandboxing enforcement on MHTML pages.
     if (!canLoadArchive(url))
         return nullptr;
 
     MHTMLParser parser(std::move(data));
     HeapVector<Member<ArchiveResource>> resources = parser.parseArchive();
     if (resources.isEmpty())
         return nullptr; // Invalid MHTML file.
@@ skipping 172 matching lines @@
     return m_subresources.get(url.getString());
 }
 
 DEFINE_TRACE(MHTMLArchive)
 {
     visitor->trace(m_mainResource);
     visitor->trace(m_subresources);
 }
 
 } // namespace blink