Encoding API: ignore leading/trailing whitespace in labels

Source/modules/encoding/TextDecoder.cpp

 /*
  * Copyright (C) 2013 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 17 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "modules/encoding/TextDecoder.h"
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "core/dom/DOMArrayBuffer.h"
 #include "core/dom/DOMArrayBufferView.h"
 #include "core/dom/ExceptionCode.h"
+#include "modules/encoding/Encoding.h"
 #include "wtf/StringExtras.h"
 #include "wtf/text/TextEncodingRegistry.h"
 
 namespace blink {
 
 TextDecoder* TextDecoder::create(const String& label, const TextDecoderOptions& options, ExceptionState& exceptionState)
 {
-    WTF::TextEncoding encoding(label);
+    WTF::TextEncoding encoding(label.stripWhiteSpace(&Encoding::isASCIIWhiteSpace));
     // The replacement encoding is not valid, but the Encoding API also
     // rejects aliases of the replacement encoding.
     if (!encoding.isValid() || !strcasecmp(encoding.name(), "replacement")) {
         exceptionState.throwRangeError("The encoding label provided ('" + label + "') is invalid.");
         return 0;
     }
 
     return new TextDecoder(encoding, options.fatal(), options.ignoreBOM());
 }
 
@@ skipping 60 matching lines @@
     return s;
 }
 
 String TextDecoder::decode(ExceptionState& exceptionState)
 {
     TextDecodeOptions options;
     return decode(nullptr, 0, options, exceptionState);
 }
 
 } // namespace blink