WebGL 2: a small fix to support mipmap level in framebufferTexture2D

BUG=295792

Review URL: https://codereview.chromium.org/1173203013

git-svn-id: svn://svn.chromium.org/blink/trunk@197404 bbb929c8-8fbe-4397-9dbb-9b2b20218538
1 file changed