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This deletes calls to InitializeSandbox that are no longer called. These
are processes which only use the V2 sandbox.

Bug: 917445
Change-Id: I87b96a4f4071438eeaf68e6d07ddc2c9813b3e58
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1582967Reviewed-by: Robert Sesek <rsesek@chromium.org>
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Auto-Submit: Greg Kerr <kerrnel@chromium.org>
Commit-Queue: Jochen Eisinger <jochen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#654485}