Reland of Add a library for running external commands, providing timeouts and test injection.

ct/go/adb/adb.go

Index: ct/go/adb/adb.go
diff --git a/ct/go/adb/adb.go b/ct/go/adb/adb.go
index 00a8b0b848cd21cdd9ba0cf0338e73ad7d72727b..0f97dc7bf09bc5e500c7945bfc7d94ae04634ef4 100644
--- a/ct/go/adb/adb.go
+++ b/ct/go/adb/adb.go
@@ -6,9 +6,8 @@ import (
 	"os/exec"
 	"time"
 
-	"github.com/skia-dev/glog"
-
 	"go.skia.org/infra/ct/go/util"
+	skexec "go.skia.org/infra/go/exec"
 	skutil "go.skia.org/infra/go/util"
 )
 
@@ -27,7 +26,7 @@ func VerifyLocalDevice() error {
 	devicesCmd := exec.Command(util.BINARY_ADB, "devices")
 	offlineCmd := exec.Command("grep", "offline")
 	offlineCmd.Stdin, _ = devicesCmd.StdoutPipe()
-	offlineCmd.Stdout = util.WriteLog{LogFunc: glog.Infof, OutputFile: nil}
+	offlineCmd.Stdout = skexec.WriteInfoLog
 	skutil.LogErr(offlineCmd.Start())
 	skutil.LogErr(devicesCmd.Run())
 	if err := offlineCmd.Wait(); err == nil {
@@ -40,7 +39,7 @@ func VerifyLocalDevice() error {
 	devicesCmd = exec.Command(util.BINARY_ADB, "devices")
 	missingCmd := exec.Command("grep", "device$")
 	missingCmd.Stdin, _ = devicesCmd.StdoutPipe()
-	missingCmd.Stdout = util.WriteLog{LogFunc: glog.Infof, OutputFile: nil}
+	missingCmd.Stdout = skexec.WriteInfoLog
 	skutil.LogErr(missingCmd.Start())
 	skutil.LogErr(devicesCmd.Run())
 	if err := missingCmd.Wait(); err != nil {