diff --git a/go.sum b/go.sum
index d701af7..884fd6b 100644
--- a/go.sum
+++ b/go.sum
@@ -13,6 +13,8 @@
 cloud.google.com/go v0.43.0/go.mod h1:BOSR3VbTLkk6FDC/TcffxP4NF/FFBGA5ku+jvKOP7pg=
 cloud.google.com/go v0.44.0 h1:0BWXxb/yzTc5MjzcLfBceY2xuwawl5cIbCC7qsLuktA=
 cloud.google.com/go v0.44.0/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
+cloud.google.com/go v0.44.1 h1:7gXaI3V/b4DRaK++rTqhRajcT7z8gtP0qKMZTXqlySM=
+cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
 cloud.google.com/go/logging v1.0.0 h1:kaunpnoEh9L4hu6JUsBa8Y20LBfKnCuDhKUgdZp7oK8=
 cloud.google.com/go/logging v1.0.0/go.mod h1:V1cc3ogwobYzQq5f2R7DS/GvRIrI4FKj01Gs5glwAls=
 contrib.go.opencensus.io/exporter/ocagent v0.4.12/go.mod h1:450APlNTSR6FrvC3CTRqYosuDstRB9un7SOx2k/9ckA=
@@ -98,6 +100,7 @@
 github.com/aws/aws-sdk-go v1.22.1/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
 github.com/aws/aws-sdk-go v1.22.2/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
 github.com/aws/aws-sdk-go v1.22.3/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
+github.com/aws/aws-sdk-go v1.22.4/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/beorn7/perks v1.0.0 h1:HWo1m869IqiPhD389kmkxeTalrjNbbJTC8LXupb+sl0=
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
@@ -256,6 +259,7 @@
 github.com/gophercloud/gophercloud v0.3.0/go.mod h1:vxM41WHh5uqHVBMZHzuwNOHh8XEoIEcSTewFxm1c5g8=
 github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY=
 github.com/gopherjs/gopherjs v0.0.0-20190430165422-3e4dfb77656c/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY=
+github.com/gopherjs/gopherjs v0.0.0-20190812055157-5d271430af9f/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY=
 github.com/gorilla/context v1.1.1/go.mod h1:kBGZzfjB9CEq2AlWe17Uuf7NDRt0dE0s8S51q0aT7Yg=
 github.com/gorilla/csrf v1.5.1/go.mod h1:HTDW7xFOO1aHddQUmghe9/2zTvg7AYCnRCs7MxTGu/0=
 github.com/gorilla/csrf v1.6.0/go.mod h1:7tSf8kmjNYr7IWDCYhd3U8Ck34iQ/Yw5CJu7bAkHEGI=
@@ -393,6 +397,8 @@
 github.com/prometheus/client_model v0.0.0-20190115171406-56726106282f/go.mod h1:MbSGuTsp3dbXC40dX6PRTWyKYBIrTGTE9sqQNg2J8bo=
 github.com/prometheus/client_model v0.0.0-20190129233127-fd36f4220a90 h1:S/YWwWx/RA8rT8tKFRuGUZhuA90OyIBpPCXkcbwU8DE=
 github.com/prometheus/client_model v0.0.0-20190129233127-fd36f4220a90/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
+github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4 h1:gQz4mCbXsO+nc9n1hCxHcGA3Zx3Eo+UHZoInFGUIXNM=
+github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
 github.com/prometheus/common v0.0.0-20181113130724-41aa239b4cce/go.mod h1:daVV7qP5qjZbuso7PdcryaAu0sAZbrN9i7WWcTMWvro=
 github.com/prometheus/common v0.2.0/go.mod h1:TNfzLD0ON7rHzMJeJkieUDPYmFC7Snx/y86RQel1bk4=
 github.com/prometheus/common v0.3.0 h1:taZ4h8Tkxv2kNyoSctBvfXEHmBmxrwmIidZTIaHons4=
@@ -552,6 +558,8 @@
 go.chromium.org/luci v0.0.0-20190808223307-9f0dd37dd32b/go.mod h1:MIQewVTLvOvc0UioV0JNqTNO/RspKFS0XEeoKrOxsdM=
 go.chromium.org/luci v0.0.0-20190809234954-b258e04d4067 h1:0bsAXQ88Q8jzXf8MeeRbH6ayClFGzUZuB0y6NsRORGA=
 go.chromium.org/luci v0.0.0-20190809234954-b258e04d4067/go.mod h1:MIQewVTLvOvc0UioV0JNqTNO/RspKFS0XEeoKrOxsdM=
+go.chromium.org/luci v0.0.0-20190813043604-bacf46204919 h1:E3rOIw6slnPCc96wMAWFQ0xJeg3LUHQQU1OYgB2SpA4=
+go.chromium.org/luci v0.0.0-20190813043604-bacf46204919/go.mod h1:MIQewVTLvOvc0UioV0JNqTNO/RspKFS0XEeoKrOxsdM=
 go.etcd.io/bbolt v1.3.2/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
 go.etcd.io/bbolt v1.3.3/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
 go.opencensus.io v0.20.1/go.mod h1:6WKK9ahsWS3RSO+PY9ZHZUfv2irvY6gN279GOPZjmmk=
@@ -652,6 +660,8 @@
 go.skia.org/infra v0.0.0-20190810052033-f4a8ecfa48f1/go.mod h1:PgvChKXNawYFI57OouC/mdjhcoR2cQv+NEml9tJR6MA=
 go.skia.org/infra v0.0.0-20190811172506-db30b03dfea1 h1:wRGkw7B2HAoWQdIR3WrAw8UESi5fGcWs7AbBjfz9ql0=
 go.skia.org/infra v0.0.0-20190811172506-db30b03dfea1/go.mod h1:PgvChKXNawYFI57OouC/mdjhcoR2cQv+NEml9tJR6MA=
+go.skia.org/infra v0.0.0-20190813002646-903d961709e9 h1:/tZPqeVOqkuLCG4OlF9aBpfOWX8wszUkMkiuE61Z2Ek=
+go.skia.org/infra v0.0.0-20190813002646-903d961709e9/go.mod h1:XP4QML3sRvQbvRIVWjjy8ruIEcCEYrS5zQwFxbAKb5c=
 go.skia.org/skia v0.0.0-20190503181046-70aab823547a h1:+9xKwnzXTkTu+2ZVhffRu0A60Jx/gOETiNlKkzqbnRY=
 go.skia.org/skia v0.0.0-20190503181046-70aab823547a/go.mod h1:oVrxmr1FXbVQ7PeGtZ28Kg5wPvB+bNsnw1n2j5rtfTY=
 go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
@@ -794,6 +804,8 @@
 golang.org/x/sys v0.0.0-20190801041406-cbf593c0f2f3/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190804053845-51ab0e2deafa h1:KIDDMLT1O0Nr7TSxp8xM5tJcdn8tgyAONntO829og1M=
 golang.org/x/sys v0.0.0-20190804053845-51ab0e2deafa/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190812172437-4e8604ab3aff h1:u5LtynOOWSPG+jkEa3Y4ATlQ05vVeRvFjYSvbG0z6uw=
+golang.org/x/sys v0.0.0-20190812172437-4e8604ab3aff/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.0.0-20160726164857-2910a502d2bf/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
@@ -899,6 +911,8 @@
 golang.org/x/tools v0.0.0-20190808195139-e713427fea3f/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20190809145639-6d4652c779c4 h1:nb/VzWPGGAIZrdtzn2veQWvZ+d+PTuKNBqB6SVOzljo=
 golang.org/x/tools v0.0.0-20190809145639-6d4652c779c4/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20190813034749-528a2984e271 h1:T33mP0l8Vpvq5ocfcmgKXW2GhpymOUxqiAh4FgBsJck=
+golang.org/x/tools v0.0.0-20190813034749-528a2984e271/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools/gopls v0.1.0/go.mod h1:p8Q0IUu6EEeGxqmoN/g6Et3gReLCGA7PtNRdyOxcWJE=
 golang.org/x/tools/gopls v0.1.1/go.mod h1:RYlHDmWjvTa1HuWNyEKa6/zzI2ums47cfsozmM0466w=
 golang.org/x/tools/gopls v0.1.3/go.mod h1:vrCQzOKxvuiZLjCKSmbbov04oeBQQOb4VQqwYK2PWIY=
@@ -1008,6 +1022,7 @@
 k8s.io/api v0.0.0-20190806064354-8b51d7113622/go.mod h1:SgXHCRh94q+5GrRf9Dty2ZG8+wCVmqvQbZJXXcAswkw=
 k8s.io/api v0.0.0-20190808180749-077ce48e77da/go.mod h1:irWZZ8fkUYB2+fwyvjN9QMt0m5/1PYsJc1eJElzGHeM=
 k8s.io/api v0.0.0-20190809220925-3ab596449d6f/go.mod h1:3Iy+myeAORNCLgjd/Xu9ebwN7Vh59Bw0vh9jhoX+V58=
+k8s.io/api v0.0.0-20190813020757-36bff7324fb7/go.mod h1:3Iy+myeAORNCLgjd/Xu9ebwN7Vh59Bw0vh9jhoX+V58=
 k8s.io/apimachinery v0.0.0-20190424212440-527a9d33701e/go.mod h1:5CBnzrKYGHzv9ZsSKmQ8wHt4XI4/TUBPDwYM9FlZMyw=
 k8s.io/apimachinery v0.0.0-20190425132440-17f84483f500/go.mod h1:5CBnzrKYGHzv9ZsSKmQ8wHt4XI4/TUBPDwYM9FlZMyw=
 k8s.io/apimachinery v0.0.0-20190430211124-5bae42371a56/go.mod h1:5CBnzrKYGHzv9ZsSKmQ8wHt4XI4/TUBPDwYM9FlZMyw=