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This is a debugging feature that will be used on the official Win64 continuous builder to get a repro for some linker failures that we're observing. Having a link repro is the only way for us to report this kind of error to Microsoft in order for them to fix it (we haven't been able to reproduce this linker failure locally, but this hit us really often on the official builders).

BUG=669854
TBR=bengr@chromium.org

Review-Url: https://codereview.chromium.org/2570483004
Cr-Commit-Position: refs/heads/master@{#438621}