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This patch is to check if the mismatching EmbeddedWorker was launched on a new
process. If it's true, OnSetHostedVersionId IPC might be reached after
restarting the EmbeddedWorker.

BUG=668633

Review-Url: https://codereview.chromium.org/2627723004
Cr-Commit-Position: refs/heads/master@{#443543}