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This might have been useful before while trying to get the system running. But now we have swarming running on Linux/Mac/Windows trybots, so it's not so useful. It's also confusing when tests fail on swarming machines because an isolate file referred to a binary that wasn't in the dependencies.

BUG=414808

Review URL: https://codereview.chromium.org/575363002

Cr-Commit-Position: refs/heads/master@{#295514}