This splits checkObjectAllocation into the inline part and the
slow part. It uses ANGLE_INLINE to force the former to be inlined.

Also inlines and optimizes a few other buffer binding related checks.

Improves performance in a bindings performance test by about 20%.

Includes contributions from matavenrath@nvidia.com.

Test: Bindings_gl_100_objects_allocated_at_initialization
Bug: angleproject:2777
Change-Id: I71b07d72a8e81db7a90140ef84eca599a29239ed
Reviewed-on: https://chromium-review.googlesource.com/1190442Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>