Fix bindings tests after r149858

Source/bindings/scripts/preprocess-idls.pl

 #!/usr/bin/perl -w
 #
 # Copyright (C) 2011 Google Inc.  All rights reserved.
 #
 # This library is free software; you can redistribute it and/or
 # modify it under the terms of the GNU Library General Public
 # License as published by the Free Software Foundation; either
 # version 2 of the License, or (at your option) any later version.
 #
 # This library is distributed in the hope that it will be useful,
@@ skipping 59 matching lines @@
     $idlFileToInterfaceName{$fullPath} = $interfaceName;
     $supplementals{$fullPath} = [];
 }
 
 # Generate DOMWindow Constructors partial interface.
 open PARTIAL_WINDOW_FH, "> $windowConstructorsFile" or die "Cannot open $windowConstructorsFile\n";
 print PARTIAL_WINDOW_FH "partial interface DOMWindow {\n";
 print PARTIAL_WINDOW_FH $constructorAttributesCode;
 print PARTIAL_WINDOW_FH "};\n";
 close PARTIAL_WINDOW_FH;
-$supplementalDependencies{$windowConstructorsFile} = "DOMWindow";
+$supplementalDependencies{$windowConstructorsFile} = "DOMWindow" if $interfaceNameToIdlFile{"DOMWindow"};
 
 # Resolves partial interfaces dependencies.
 foreach my $idlFile (keys %supplementalDependencies) {
     my $baseFile = $supplementalDependencies{$idlFile};
     my $targetIdlFile = $interfaceNameToIdlFile{$baseFile};
     push(@{$supplementals{$targetIdlFile}}, $idlFile);
     delete $supplementals{$idlFile};
 }
 
 # Outputs the dependency.
@@ skipping 95 matching lines @@
             my $key = trim($keyValue[0]);
             next unless length($key);
             my $value = "VALUE_IS_MISSING";
             $value = trim($keyValue[1]) if @keyValue > 1;
             $extendedAttributes->{$key} = $value;
         }
     }
 
     return $extendedAttributes;
 }