Mark inspector/tracing/decode-resize.html as flaky on Mac10.7
Mark inspector/tracing/decode-resize.html as flaky on Mac10.7

BUG=587779
TBR=engedy,peria,shrike,rouslan
NOTRY=true

Review URL: https://codereview.chromium.org/1721283003

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#376946}

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