Improve 'Selection' exception messages.

Source/bindings/v8/ExceptionMessages.h

 /*
  * 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 10 matching lines @@
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * 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.
  */
 
-#ifndef URLMediaStream_h
-#define URLMediaStream_h
+#ifndef ExceptionMessages_h
+#define ExceptionMessages_h
 
-#include "wtf/Forward.h"
+#include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
-class MediaStream;
-class ScriptExecutionContext;
-
-class URLMediaStream {
+class ExceptionMessages {
 public:
-    static String createObjectURL(ScriptExecutionContext*, MediaStream*);
+    static String failedToExecute(const String& method, const String& type, const String& detail);
 };
 
 } // namespace WebCore
 
-#endif
+#endif // ExceptionMessages_h