Move recently added functions to V8_USE_EXTERNAL_STARTUP_DATA
Move recently added functions to V8_USE_EXTERNAL_STARTUP_DATA

With the change in https://codereview.chromium.org/1665513002
the contributor missed out adding couple of the functions within
appropriate #if defined(V8_USE_EXTERNAL_STARTUP_DATA) block

BUG=

Review URL: https://codereview.chromium.org/1909383004

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#389626}

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