TexSubImage2D no longer needs to match the type in ES3.

Texture::ValidForTexture really should not validate type match. Most
times it's no op, and one time it's duplicated effort (TexSubImage2D in
ES2) and generating wrong error (INVALID_VALUE instead of INVALID_OPERATION).

BUG=532708,429053
TEST=gpu_unittests
R=piman@chromium.org

Review URL: https://codereview.chromium.org/1344373004

Cr-Commit-Position: refs/heads/master@{#349585}
5 files changed