and .cpp files for [Supplemental] IDLs
https://bugs.webkit.org/show_bug.cgi?id=75082

Reviewed by Darin Adler.

In bug 74481, we changed generate-bindings.pl so that it generates empty .h
and .cpp files for the [Supplemental] IDLs. However, the filename prefixes of
those .h and .cpp files are wrong. This patch fixes the prefixes as follows:

    generator=JS  => JS*.h, JS*.cpp
    generator=V8  => V8*.h, V8*.cpp
    generator=ObjC  => DOM*.h, DOM*.cpp
    generator=GObject  => WebKitDOM*.h, WebKitDOM*.cpp
    generator=CPP  => WebDOM*.h, WebDOM*.cpp

No new tests. No change in behavior.
I confirmed that the names of generated .h and .cpp files are correct.

* bindings/scripts/CodeGenerator.pm:
(FileNamePrefix): Returns the prefix of file names.
* bindings/scripts/CodeGeneratorCPP.pm:
(GenerateInterface): Uses CodeGenerator::FileNamePrefix.
* bindings/scripts/CodeGeneratorGObject.pm:
(GenerateInterface): Ditto.
* bindings/scripts/CodeGeneratorJS.pm:
(GenerateInterface): Ditto.
* bindings/scripts/CodeGeneratorObjC.pm:
(GenerateInterface): Ditto.
* bindings/scripts/CodeGeneratorV8.pm:
(GenerateInterface): Ditto.
* bindings/scripts/generate-bindings.pl:
(generateEmptyHeaderAndCpp): Ditto.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@103678 268f45cc-cd09-0410-ab3c-d52691b4dbfc