Use AtomicString type more consistently for mimeType / encoding

Source/platform/mhtml/MHTMLParser.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 242 matching lines @@
             return 0;
         }
         addResourceToArchive(resource.get(), archive.get());
     }
 
     return archive.release();
 }
 
 void MHTMLParser::addResourceToArchive(ArchiveResource* resource, MHTMLArchive* archive)
 {
-    const String& mimeType = resource->mimeType();
+    const AtomicString& mimeType = resource->mimeType();
     if (!MIMETypeRegistry::isSupportedNonImageMIMEType(mimeType) || MIMETypeRegistry::isSupportedJavaScriptMIMEType(mimeType) || mimeType == "text/css") {
         m_resources.append(resource);
         return;
     }
 
     // The first document suitable resource is the main frame.
     if (!archive->mainResource()) {
         archive->setMainResource(resource);
         m_frames.append(archive);
         return;
@@ skipping 83 matching lines @@
         break;
     default:
         WTF_LOG_ERROR("Invalid encoding for MHTML part.");
         return 0;
     }
     RefPtr<SharedBuffer> contentBuffer = SharedBuffer::adoptVector(data);
     // FIXME: the URL in the MIME header could be relative, we should resolve it if it is.
     // The specs mentions 5 ways to resolve a URL: http://tools.ietf.org/html/rfc2557#section-5
     // IE and Firefox (UNMht) seem to generate only absolute URLs.
     KURL location = KURL(KURL(), mimeHeader.contentLocation());
-    return ArchiveResource::create(contentBuffer, location, mimeHeader.contentType(), mimeHeader.charset(), String());
+    return ArchiveResource::create(contentBuffer, location, AtomicString(mimeHeader.contentType()), AtomicString(mimeHeader.charset()), String());
 }
 
 size_t MHTMLParser::frameCount() const
 {
     return m_frames.size();
 }
 
 MHTMLArchive* MHTMLParser::frameAt(size_t index) const
 {
     return m_frames[index].get();
 }
 
 size_t MHTMLParser::subResourceCount() const
 {
     return m_resources.size();
 }
 
 ArchiveResource* MHTMLParser::subResourceAt(size_t index) const
 {
     return m_resources[index].get();
 }
 
 }