Only load extension entry points if the extension is supported.
From the eglGetProcAddress manpage:
"A non-NULL return value does not guarantee that an extension function
is actually supported at runtime. The client must also make a
corresponding query, such as glGetString(GL_EXTENSIONS) for OpenGL and
OpenGL ES extensions [...] to determine if a function is supported by
EGL or a specific client API context."
This required moving extension initialization from OpenGLFunctions
into OpenGLFunctionsBase.
Change-Id: Ib4e8360ba455818701990b4476689b651d097ca8
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/121760
Commit-Queue: Stephen White <senorblanco@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
55183e6c3a