Expose WebGL texture compression methods on WebGLRenderingContext

Expose WebGL texture compression methods on WebGLRenderingContext
https://bugs.webkit.org/show_bug.cgi?id=76763

Patch by Gregg Tavares <gman@google.com> on 2012-01-24
Reviewed by Kenneth Russell.

Source/WebCore:

Test: fast/canvas/webgl/compressed-tex-image.html

* html/canvas/WebGLRenderingContext.cpp:
(WebCore::WebGLRenderingContext::compressedTexImage2D):
(WebCore::WebGLRenderingContext::compressedTexSubImage2D):
* html/canvas/WebGLRenderingContext.h:
* html/canvas/WebGLRenderingContext.idl:

LayoutTests:

* fast/canvas/webgl/compressed-tex-image-expected.txt: Added.
* fast/canvas/webgl/compressed-tex-image.html: Added.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@105706 268f45cc-cd09-0410-ab3c-d52691b4dbfc