This error in findit seems to be due to 429s

https://pantheon.corp.google.com/errors/CKPyg9_Ngt7CTg?time=P1D&filter&project=findit-for-me

The request has this error entry: 
Request to https://chromium.googlesource.com/chromium/src.git/+/04c9db95de540d4ead1d8297e7b4023a310b7a34/DEPS?format=text resulted in 429, headers:[["x-xss-protection", "1; mode=block"], ["x-content-type-options", "nosniff"], ["transfer-encoding", "chunked"], ["set-cookie", "gi=;Path=/;Secure;HttpOnly"], ["strict-transport-security", "max-age=31536000; includeSubDomains; preload"], ["x-errorid", "429, EFERW-191,EFERW-184,GQF-110,GQF-72,GQF-59,GSF-26,MF-185,GGF-152,OGCWF-35,HMF-184,AF-205,AF-116,GFF-171,STSFSPSF-194,GFFFCW-294,GFFFCW-294,GFFFCW-294,GFFFCW-294,GFFFCW-294,STSFSPSF-194,GFFGAF-247,AF-112,SCZFI-159,CWHF-113,CRF-96,CAF-131,SSF-25,GUUAF-142,MHF-109,EF-124,GAEF-72,GBLHCF-116,STSF-153,SF-65,EBF-68,TTLF-155,PLRHF-269,IIIHF-47,DF-170,DF-60,EUCDLF-106,GSI-82,RR-116"], ["x-quota-info", "gitiles-view:findit-for-me@appspot.gserviceaccount.com=1L"], ["date", "Mon, 22 Jan 2018 20:59:43 GMT"], ["x-frame-options", "SAMEORIGIN"], ["alt-svc", "hq=\":443\"; ma=2592000; quic=51303431; quic=51303339; quic=51303338; quic=51303337; quic=51303335,quic=\":443\"; ma=2592000; v=\"41,39,38,37,35\""], ["content-type", "text/plain; charset=utf-8"]] (/base/data/home/apps/s~findit-for-me/waterfall-backend:13566-065dd65.406871612171608300/gae_libs/http/http_client_appengine.py:55)