Remove support for [LegacyImplementedInBaseClass] IDL extended attribute

Source/bindings/scripts/generate_bindings.pl

 #!/usr/bin/perl -w
 #
 # Copyright (C) 2005 Apple Computer, Inc.
 # Copyright (C) 2006 Anders Carlsson <andersca@mac.com>
 #
 # This file is part of WebKit
 #
 # 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
@@ skipping 97 matching lines @@
                 if ($interface->name eq $targetInterfaceName) {
                     $targetDataNode = $interface;
                     last;
                 }
             }
             die "Not found an interface ${targetInterfaceName} in ${targetInterfaceName}.idl." unless defined $targetDataNode;
 
             # Support for attributes of partial interfaces.
             foreach my $attribute (@{$interface->attributes}) {
                 # Record that this attribute is implemented by $interfaceName.
-                $attribute->extendedAttributes->{"ImplementedBy"} = $interfaceName unless $interface->extendedAttributes->{"LegacyImplementedInBaseClass"};
+                $attribute->extendedAttributes->{"ImplementedBy"} = $interfaceName;
 
                 # Add interface-wide extended attributes to each attribute.
                 applyInterfaceExtendedAttributes($interface, $attribute->extendedAttributes);
 
                 push(@{$targetDataNode->attributes}, $attribute);
             }
 
             # Support for methods of partial interfaces.
             foreach my $function (@{$interface->functions}) {
                 # Record that this method is implemented by $interfaceName.
-                $function->extendedAttributes->{"ImplementedBy"} = $interfaceName unless $interface->extendedAttributes->{"LegacyImplementedInBaseClass"};
+                $function->extendedAttributes->{"ImplementedBy"} = $interfaceName;
 
                 # Add interface-wide extended attributes to each method.
                 applyInterfaceExtendedAttributes($interface, $function->extendedAttributes);
 
                 push(@{$targetDataNode->functions}, $function);
             }
 
             # Support for constants of partial interfaces.
             foreach my $constant (@{$interface->constants}) {
                 # Record that this constant is implemented by $interfaceName.
-                $constant->extendedAttributes->{"ImplementedBy"} = $interfaceName unless $interface->extendedAttributes->{"LegacyImplementedInBaseClass"};
+                $constant->extendedAttributes->{"ImplementedBy"} = $interfaceName;
 
                 # Add interface-wide extended attributes to each constant.
                 applyInterfaceExtendedAttributes($interface, $constant->extendedAttributes);
 
                 push(@{$targetDataNode->constants}, $constant);
             }
         } else {
             die "$idlFile is not a dependency of $targetIdlFile. There maybe a bug in the dependency computer (compute_dependencies.py).\n";
         }
     }
@@ skipping 107 matching lines @@
     }
     if ($error) {
         die "IDL ATTRIBUTE CHECKER ERROR: $error
 If you want to add a new IDL extended attribute, please add it to:
     bindings/IDLExtendedAttributes.txt
 and add an explanation to the Blink IDL documentation at:
     http://www.chromium.org/blink/webidl/blink-idl-extended-attributes
 ";
     }
 }