[milo] Refactor all html knowledge out of backends.

milo/buildsource/buildbucket/builder.go

Index: milo/buildsource/buildbucket/builder.go
diff --git a/milo/buildsource/buildbucket/builder.go b/milo/buildsource/buildbucket/builder.go
index 4bbfee914bfd96f5e03a0c997fc77b544d0aee40..b079390745506d321e5eb68f2726e9351c45830f 100644
--- a/milo/buildsource/buildbucket/builder.go
+++ b/milo/buildsource/buildbucket/builder.go
@@ -305,3 +305,13 @@ func (a newBuildsFirst) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
 func (a newBuildsFirst) Less(i, j int) bool {
 	return a[i].PendingTime.Started.After(a[j].PendingTime.Started)
 }
+
+// GetBuilder is used by buildsource.BuilderID.Get to obtain the resp.Builder.
+func GetBuilder(ctx context.Context, bucket, builder string, limit int) (*resp.Builder, error) {
+	// TODO(iannucci): set buildbucket host?

[Ryan Tseng, 2017/07/13 22:00:46]

buildbucket:milo is a 1:1 relationship atm, so it's not needed currently.

[iannucci, 2017/07/14 19:00:22]

yeah hence todo :)

+	var query builderQuery

[Ryan Tseng, 2017/07/13 22:00:46]

nit: inline

[iannucci, 2017/07/14 19:00:22]

Done.

+	query.Bucket = bucket
+	query.Builder = builder
+	query.Limit = limit
+	return builderImpl(ctx, query)
+}