Reviewed by James Robinson.

        [chromium] WebGLRenderingContext and other DOMWindow properties should remain if WebGL is disabled
        https://bugs.webkit.org/show_bug.cgi?id=56947

        Removed the WebRuntimeFeatures setting for WebGL. WebGL support is
        now controlled exclusively through the page's Settings.

        * public/WebRuntimeFeatures.h:
        * src/WebRuntimeFeatures.cpp:
2011-03-23  Kenneth Russell  <kbr@google.com>

        Reviewed by James Robinson.

        [chromium] WebGLRenderingContext and other DOMWindow properties should remain if WebGL is disabled
        https://bugs.webkit.org/show_bug.cgi?id=56947

        Removed the RuntimeEnabledFeatures setting for WebGL and the
        EnabledAtRuntime extended attribute from the WebGL-related
        properties on the DOMWindow. WebGL support is now controlled
        exclusively through the page's Settings.

        No new tests; tested manually in Chromium with --disable-webgl
        command line argument and blacklist.

        * bindings/generic/RuntimeEnabledFeatures.cpp:
        * bindings/generic/RuntimeEnabledFeatures.h:
        * page/DOMWindow.idl:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@81821 268f45cc-cd09-0410-ab3c-d52691b4dbfc