[WebGL] WebGLBuffer can be too large

[WebGL] WebGLBuffer can be too large
https://bugs.webkit.org/show_bug.cgi?id=195068
<rdar://problem/48414289>

Reviewed by Antoine Quint.

Source/WebCore:

When creating an element array buffer, make sure to
test against the maximum size of an ArrayBuffer, rather
than just assume it can be created.

Test: fast/canvas/webgl/largeBuffer.html

* html/canvas/WebGLBuffer.cpp:
(WebCore::WebGLBuffer::associateBufferDataImpl):

LayoutTests:

* fast/canvas/webgl/largeBuffer-expected.txt: Added.
* fast/canvas/webgl/largeBuffer.html: Added.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@242826 268f45cc-cd09-0410-ab3c-d52691b4dbfc