[Telemetry] Fix telemetry on android after r174969.
[Telemetry] Fix telemetry on android after r174969.

BUG=157459
TEST=tools/perf/run_multipage_benchmarks --browser=android-content-shell scrolling_benchmark tools/perf/page_sets/top_25.json

Review URL: https://codereview.chromium.org/11759017

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@175049 0039d316-1c4b-4281-b951-d872f2087c98

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