[Frameworks roll] Roll to 343747486 piper revision

TBR=bling-team@google.com

Change-Id: Ibd519f39d19e8e29a9e53d1feee864209f84accb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2553692Reviewed-by: Internal Frameworks Autoroller <bling-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Internal Frameworks Autoroller <bling-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#830060}

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