Mark the AtomicString(const String&) constructor as explicit

Source/core/fileapi/FileReaderLoader.cpp

 /*
  * Copyright (C) 2010 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 84 matching lines @@
         BlobRegistry::registerPublicBlobURL(executionContext->securityOrigin(), m_urlForReading, blobData);
     } else {
         ASSERT(stream);
         BlobRegistry::registerStreamURL(executionContext->securityOrigin(), m_urlForReading, stream->url());
     }
 
     // Construct and load the request.
     ResourceRequest request(m_urlForReading);
     request.setHTTPMethod("GET");
     if (m_hasRange)
-        request.setHTTPHeaderField("Range", String::format("bytes=%d-%d", m_rangeStart, m_rangeEnd));
+        request.setHTTPHeaderField("Range", AtomicString(String::format("bytes=%d-%d", m_rangeStart, m_rangeEnd)));
 
     ThreadableLoaderOptions options;
     options.sniffContent = DoNotSniffContent;
     options.preflightPolicy = ConsiderPreflight;
     options.allowCredentials = AllowStoredCredentials;
     options.crossOriginRequestPolicy = DenyCrossOriginRequests;
     // FIXME: Is there a directive to which this load should be subject?
     options.contentSecurityPolicyEnforcement = DoNotEnforceContentSecurityPolicy;
     // Use special initiator to hide the request from the inspector.
     options.initiator = FetchInitiatorTypeNames::internal;
@@ skipping 276 matching lines @@
     m_stringResult = builder.toString();
 }
 
 void FileReaderLoader::setEncoding(const String& encoding)
 {
     if (!encoding.isEmpty())
         m_encoding = WTF::TextEncoding(encoding);
 }
 
 } // namespace WebCore