This removes the usage of {FrameStateBeforeAndAfter} from the graph
building for count operations. The {JSAdd} or {JSSubtract} node in
question no longer needs the frame-state attached.

R=bmeurer@chromium.org

Review-Url: https://codereview.chromium.org/2127523002
Cr-Commit-Position: refs/heads/master@{#37529}