New options: v8_enable_trace_maps, v8_enable_v8_checks.
Renamed options for consistency: v8_object_print to v8_enable_object_print.
Fixed options: v8_enable_verify_heap, v8_enable_object_print.

BUG=

Review-Url: https://codereview.chromium.org/2625393003
Cr-Commit-Position: refs/heads/master@{#42338}