[crankshaft] Record inlined shared function infos instead of closures.

[crankshaft] Record inlined shared function infos instead of closures.

The list of inlined functions is used in exactly two places - for live
edit and to prevent code flushing for inlined functions - and those are
fine with SharedFunctionInfo and don't require a closure.

This is one additional step towards inlining based on SharedFunctionInfo
instead of JSFunction.

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/1145893003

Cr-Commit-Position: refs/heads/master@{#28672}