When optimizing deserialized code, make sure IC state is preserved.

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/737373003

Cr-Commit-Position: refs/heads/master@{#25444}
Remove superflous SharedFunctionInfo::uses_super call.

R=danno@chromium.org

Review URL: https://codereview.chromium.org/736383002

Cr-Commit-Position: refs/heads/master@{#25445}
[turbofan] Clean up and factor out branch generation logic.

R=dcarney@chromium.org
BUG=

Review URL: https://codereview.chromium.org/745633002

Cr-Commit-Position: refs/heads/master@{#25446}