Rename deprecated "supplemental_dependencies" and clean up IDL dependency script

Source/bindings/scripts/CodeGeneratorV8.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 102 matching lines @@
 use Cwd;
 use File::Basename;
 use File::Find;
 use File::Spec;
 
 my $idlDocument;
 my $idlDirectories;
 my $preprocessor;
 my $defines;
 my $verbose;
-my $dependentIdlFiles;
+my $interfaceIdlFiles;
 my $writeFileOnlyIfChanged;
 my $sourceRoot;
 
 # Cache of IDL file pathnames.
 my $idlFiles;
 my $cachedInterfaces = {};
 
 my %implIncludes = ();
 my %headerIncludes = ();
 
@@ skipping 122 matching lines @@
 sub new
 {
     my $object = shift;
     my $reference = { };
 
     $idlDocument = shift;
     $idlDirectories = shift;
     $preprocessor = shift;
     $defines = shift;
     $verbose = shift;
-    $dependentIdlFiles = shift;
+    $interfaceIdlFiles = shift;
     $writeFileOnlyIfChanged = shift;
 
     $sourceRoot = getcwd();
 
     bless($reference, $object);
     return $reference;
 }
 
 
 sub IDLFileForInterface
 {
     my $interfaceName = shift;
 
     unless ($idlFiles) {
         my @directories = map { $_ = "$sourceRoot/$_" if -d "$sourceRoot/$_"; $_ } @$idlDirectories;
         push(@directories, ".");
 
         $idlFiles = { };
-        foreach my $idlFile (@$dependentIdlFiles) {
+        foreach my $idlFile (@$interfaceIdlFiles) {
             $idlFiles->{fileparse(basename($idlFile), ".idl")} = $idlFile;
         }
 
         my $wanted = sub {
             $idlFiles->{$1} = $File::Find::name if /^([A-Z].*)\.idl$/;
             $File::Find::prune = 1 if /^\../;
         };
         find($wanted, @directories);
     }
 
@@ skipping 5740 matching lines @@
         if ($currentInterface->extendedAttributes->{$extendedAttribute}) {
             $found = 1;
         }
         return 1 if $found;
     }, 0);
 
     return $found;
 }
 
 1;