Encoding API: ignore leading/trailing whitespace in labels

Source/modules/encoding/TextEncoder.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 15 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 
 #include "modules/encoding/TextEncoder.h"
 
 #include "bindings/core/v8/ExceptionState.h"
+#include "modules/encoding/Encoding.h"
 #include "wtf/text/CString.h"
 #include "wtf/text/TextEncodingRegistry.h"
 
 namespace blink {
 
 TextEncoder* TextEncoder::create(const String& utfLabel, ExceptionState& exceptionState)
 {
-    WTF::TextEncoding encoding(utfLabel);
+    WTF::TextEncoding encoding(utfLabel.stripWhiteSpace(&Encoding::isASCIIWhiteSpace));
     if (!encoding.isValid()) {
         exceptionState.throwRangeError("The encoding label provided ('" + utfLabel + "') is invalid.");
         return 0;
     }
 
     String name(encoding.name());
     if (name != "UTF-8" && name != "UTF-16LE" && name != "UTF-16BE") {
         exceptionState.throwRangeError("The encoding provided ('" + utfLabel + "') is not one of 'utf-8', 'utf-16', or 'utf-16be'.");
         return 0;
     }
@@ skipping 26 matching lines @@
     else
         result = m_codec->encode(input.characters16(), input.length(), WTF::QuestionMarksForUnencodables);
 
     const char* buffer = result.data();
     const unsigned char* unsignedBuffer = reinterpret_cast<const unsigned char*>(buffer);
 
     return DOMUint8Array::create(unsignedBuffer, result.length());
 }
 
 } // namespace blink