Fix clang/win build after https://codereview.chromium.org/1284053004/
Fix clang/win build after https://codereview.chromium.org/1284053004/

The change removed a function, but not its declaration, angering
-Wunused-function.

BUG=345845,82385
TBR=charliea

Review URL: https://codereview.chromium.org/1312313002 .

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#345460}

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