dashboard/builder: finish the previous -report=false change

We weren't using the *report flag enough.

LGTM=proppy
R=proppy
CC=golang-codereviews
https://golang.org/cl/132650043

builder/http.go

@@ -123,6 +123,9 @@ func (b *Builder) todo(kinds []string, pkg, goHash string) (kind, rev string, be
 
 // recordResult sends build results to the dashboard
 func (b *Builder) recordResult(ok bool, pkg, hash, goHash, buildLog string, runTime time.Duration) error {
+	if !*report {
+		return nil
+	}
 	req := obj{
 		"Builder":     b.name,
 		"PackagePath": pkg,
@@ -158,12 +161,18 @@ type PerfArtifact struct {
 
 // recordPerfResult sends benchmarking results to the dashboard
 func (b *Builder) recordPerfResult(req *PerfResult) error {
+	if !*report {
+		return nil
+	}
 	req.Builder = b.name
 	args := url.Values{"key": {b.key}, "builder": {b.name}}
 	return dash("POST", "perf-result", args, req, nil)
 }
 
 func postCommit(key, pkg string, l *HgLog) error {
+	if !*report {
+		return nil
+	}
 	t, err := time.Parse(time.RFC3339, l.Date)
 	if err != nil {
 		return fmt.Errorf("parsing %q: %v", l.Date, t)

builder/main.go

@@ -625,7 +625,11 @@ func isFile(name string) bool {
 // commitWatcher polls hg for new commits and tells the dashboard about them.
 func commitWatcher(goroot *Repo) {
 	if *commitInterval == 0 {
-		log.Printf("commitInterval is %s, disabling commitWatcher", *commitInterval)
+		log.Printf("commitInterval is 0; disabling commitWatcher")
+		return
+	}
+	if !*report {
+		log.Printf("-report is false; disabling commitWatcher")
 		return
 	}
 	// Create builder just to get master key.