Remove iOS code paths since this file is no longer used nor built there.
Remove iOS code paths since this file is no longer used nor built there.

As of https://codereview.chromium.org/1351803005/ the files used in this test
are no longer built and so is this test file.
This CL cleans up the conditional code paths for iOS.

BUG=448063,523296
R=ellyjones@chromium.org,thakis@chromium.org

Review URL: https://codereview.chromium.org/1369473002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#353206}

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