[WEBGL] Rename WEBKIT_WEBGL_compressed_texture_s3tc to WEBGL_compressed_texture_s3tc
https://bugs.webkit.org/show_bug.cgi?id=108866

Reviewed by Kenneth Russell.

WEBGL_compressed_texture_s3tc is one of the community approved WebGL extension.
Hence remove the vendor prefix from WEBKIT_WEBGL_compressed_texture_s3tc.
Specification: http://www.khronos.org/registry/webgl/extensions/WEBGL_compressed_texture_s3tc/

No tests currently present to test WEBKIT_WEBGL_compressed_texture_s3tc.

* bindings/js/JSWebGLRenderingContextCustom.cpp:
(WebCore::toJS):
* bindings/v8/custom/V8WebGLRenderingContextCustom.cpp:
(WebCore::toV8Object):
* html/canvas/WebGLCompressedTextureS3TC.cpp:
(WebCore::WebGLCompressedTextureS3TC::getName):
* html/canvas/WebGLExtension.h:
* html/canvas/WebGLRenderingContext.cpp:
(WebCore):
(WebCore::WebGLRenderingContext::getExtension):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@141846 268f45cc-cd09-0410-ab3c-d52691b4dbfc