Move btoa() / atob() implementation out of DOMWindow

Source/bindings/scripts/deprecated_code_generator_v8.pm

 # Copyright (C) 2005, 2006 Nikolas Zimmermann <zimmermann@kde.org>
 # Copyright (C) 2006 Anders Carlsson <andersca@mac.com>
 # Copyright (C) 2006 Samuel Weinig <sam.weinig@gmail.com>
 # Copyright (C) 2006 Alexey Proskuryakov <ap@webkit.org>
 # Copyright (C) 2006 Apple Computer, Inc.
 # Copyright (C) 2007, 2008, 2009, 2012 Google Inc.
 # Copyright (C) 2009 Cameron McCormack <cam@mcc.id.au>
 # Copyright (C) Research In Motion Limited 2010. All rights reserved.
 # Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
 # Copyright (C) 2012 Ericsson AB. All rights reserved.
@@ skipping 1092 matching lines @@
 {
     my $interfaceOrAttributeOrFunction = shift;
     return $interfaceOrAttributeOrFunction->extendedAttributes->{"ImplementedAs"} || $interfaceOrAttributeOrFunction->name;
 }
 
 sub GetImplNameFromImplementedBy
 {
     my $implementedBy = shift;
 
     my $interface = ParseInterface($implementedBy);
+
     return $interface->extendedAttributes->{"ImplementedAs"} || $implementedBy;
 }
 
 sub GenerateDomainSafeFunctionGetter
 {
     my $function = shift;
     my $interface = shift;
 
     my $implClassName = GetImplName($interface);
     my $v8ClassName = GetV8ClassName($interface);
@@ skipping 4852 matching lines @@
         if ($currentInterface->extendedAttributes->{$extendedAttribute}) {
             $found = 1;
         }
         return 1 if $found;
     }, 0);
 
     return $found;
 }
 
 1;