Instead of chartjson-result-file, since that's the flag passed by the recipe. TBR=phoglund@webrtc.org Bug: chromium:807737 Change-Id: I3a679ab7e5c0a446e675d0f4647344cc4194b357 Reviewed-on: https://webrtc-review.googlesource.com/46541 Commit-Queue: Edward Lemur <ehmaldonado@webrtc.org> Reviewed-by: Oleh Prypin <oprypin@webrtc.org> Cr-Commit-Position: refs/heads/master@{#21858}