Update WebKit IDLs after chrome roll.

fileapi/Blob.idl

 /*
  * 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 11 matching lines @@
  * 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.
  */
 
 [
-    JSGenerateIsReachable=Impl,
     CustomToJSObject,
-    JSNoStaticTables,
     CustomConstructor,
     ConstructorParameters=2
 ] interface Blob {
     readonly attribute unsigned long long size;
     readonly attribute DOMString type;
 
 #if !defined(LANGUAGE_OBJECTIVE_C)
 #if defined(ENABLE_BLOB) && ENABLE_BLOB
     Blob slice(in [Optional] long long start, in [Optional] long long end, in [Optional, TreatNullAs=NullString, TreatUndefinedAs=NullString] DOMString contentType);
 #endif
 #endif
 };