diff --git a/go.sum b/go.sum
index 9681cd1..6df17d5 100644
--- a/go.sum
+++ b/go.sum
@@ -69,6 +69,8 @@
 cloud.google.com/go/pubsub v1.4.0/go.mod h1:LFrqilwgdw4X2cJS9ALgzYmMu+ULyrUN6IHV3CPK4TM=
 cloud.google.com/go/pubsub v1.5.0 h1:9cH52jizPUVSSrSe+J16RC9wB0QI7i/cfuCm5UUCcIk=
 cloud.google.com/go/pubsub v1.5.0/go.mod h1:ZEwJccE3z93Z2HWvstpri00jOg7oO4UZDtKhwDwqF0w=
+cloud.google.com/go/pubsub v1.6.0 h1:bDVdVLswSdDKRQDXlAUKDwnW4zV5bsH99W2lqd2gd+I=
+cloud.google.com/go/pubsub v1.6.0/go.mod h1:I6DkrTv7tKIvDQTZt+6rAFo1446FEoVDJeLXTu4pCcE=
 cloud.google.com/go/spanner v1.2.0/go.mod h1:LfwGAsK42Yz8IeLsd/oagGFBqTXt3xVWtm8/KD2vrEI=
 cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
 cloud.google.com/go/storage v1.5.0 h1:RPUcBvDeYgQFMfQu1eBMq6piD1SXmLH+vK3qjewZPus=
@@ -998,6 +1000,8 @@
 go.chromium.org/luci v0.0.0-20200714005733-7a755727d74d/go.mod h1:MIQewVTLvOvc0UioV0JNqTNO/RspKFS0XEeoKrOxsdM=
 go.chromium.org/luci v0.0.0-20200722014439-1109d0aded30 h1:/l8Ed1BLOAolzbODCsHgGl0wY+5CaKZI9uPkZK7/9s8=
 go.chromium.org/luci v0.0.0-20200722014439-1109d0aded30/go.mod h1:MIQewVTLvOvc0UioV0JNqTNO/RspKFS0XEeoKrOxsdM=
+go.chromium.org/luci v0.0.0-20200723011829-5a18d1392b35 h1:C1m4wZS21oReIVg2XNMjXMzPSoz82viLNNnfRfWumKg=
+go.chromium.org/luci v0.0.0-20200723011829-5a18d1392b35/go.mod h1:MIQewVTLvOvc0UioV0JNqTNO/RspKFS0XEeoKrOxsdM=
 go.etcd.io/bbolt v1.3.2/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
 go.mongodb.org/mongo-driver v1.1.0/go.mod h1:u7ryQJ+DOzQmeO7zB6MHyr8jkEQvC8vH7qLUO4lqsUM=
 go.opencensus.io v0.20.1/go.mod h1:6WKK9ahsWS3RSO+PY9ZHZUfv2irvY6gN279GOPZjmmk=
@@ -1116,6 +1120,8 @@
 go.skia.org/infra v0.0.0-20200716131439-4244d8caa80b/go.mod h1:9W+GA25bm1ATJJudXnD5w5Eef8H5ZOMeyvoMvpDO+pM=
 go.skia.org/infra v0.0.0-20200720192647-60abe5858d25 h1:g1oy4+IZkt9pwoSAJy5kLvKuRiQ8XytsfyMmRj585DE=
 go.skia.org/infra v0.0.0-20200720192647-60abe5858d25/go.mod h1:tWlEE4kQzt/95Kp1siIyhRePuV4z3fLGYyrtn8ZwrfM=
+go.skia.org/infra v0.0.0-20200722213434-4161883552b4 h1:5cc23P7wztQR3Cx56BDU7ciXxRqhmzO+jxvM16F9Dho=
+go.skia.org/infra v0.0.0-20200722213434-4161883552b4/go.mod h1:tWlEE4kQzt/95Kp1siIyhRePuV4z3fLGYyrtn8ZwrfM=
 go.uber.org/atomic v1.3.2/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/multierr v1.1.0/go.mod h1:wR5kodmAFQ0UK8QlbwjlSNy0Z68gJhDJUG5sjR94q/0=
@@ -1379,6 +1385,8 @@
 golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200720211630-cb9d2d5c5666 h1:gVCS+QOncANNPlmlO1AhlU3oxs4V9z+gTtPwIk3p2N8=
 golang.org/x/sys v0.0.0-20200720211630-cb9d2d5c5666/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200722175500-76b94024e4b6 h1:X9xIZ1YU8bLZA3l6gqDUHSFiD0GFI9S548h6C8nDtOY=
+golang.org/x/sys v0.0.0-20200722175500-76b94024e4b6/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.0.0-20160726164857-2910a502d2bf/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
@@ -1559,6 +1567,8 @@
 golang.org/x/tools v0.0.0-20200713235242-6acd2ab80ede/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
 golang.org/x/tools v0.0.0-20200721223218-6123e77877b2 h1:kxDWg8KNMtpGjI/XVKGgOtSljTnVg/PrjhS8+0pxjLE=
 golang.org/x/tools v0.0.0-20200721223218-6123e77877b2/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
+golang.org/x/tools v0.0.0-20200723000907-a7c6fd066f6d h1:7k9BKfwmdbykG6l5ztniTrH0TP25yel8O7l26/yovMU=
+golang.org/x/tools v0.0.0-20200723000907-a7c6fd066f6d/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
 golang.org/x/xerrors v0.0.0-20190410155217-1f06c39b4373/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20190513163551-3ee3066db522/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=