ipn/ipnlocal, engine: avoid runtime/pprof with two usages of ts_omit_debug

Saves 258 KB.

Updates #12614

Change-Id: I37c2f7f916480e3534883f338de4c64d08f7ef2b
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>

cmd/tailscaled/depaware-min.txt

@@ -345,7 +345,7 @@ tailscale.com/cmd/tailscaled dependencies: (generated by github.com/tailscale/de
         internal/nettrace                                            from net+
         internal/oserror                                             from io/fs+
         internal/poll                                                from net+
-        internal/profilerecord                                       from runtime+
+        internal/profilerecord                                       from runtime
         internal/race                                                from internal/runtime/maps+
         internal/reflectlite                                         from context+
         internal/runtime/atomic                                      from internal/runtime/exithook+
@@ -398,7 +398,6 @@ tailscale.com/cmd/tailscaled dependencies: (generated by github.com/tailscale/de
         reflect                                                      from crypto/x509+
         runtime                                                      from crypto/internal/fips140+
         runtime/debug                                                from github.com/klauspost/compress/zstd+
-        runtime/pprof                                                from tailscale.com/ipn/ipnlocal+
         slices                                                       from crypto/tls+
         sort                                                         from compress/flate+
         strconv                                                      from compress/flate+
@@ -406,7 +405,6 @@ tailscale.com/cmd/tailscaled dependencies: (generated by github.com/tailscale/de
         sync                                                         from compress/flate+
         sync/atomic                                                  from context+
         syscall                                                      from crypto/internal/sysrand+
-        text/tabwriter                                               from runtime/pprof
         time                                                         from compress/gzip+
         unicode                                                      from bytes+
         unicode/utf16                                                from crypto/x509+

cmd/tailscaled/depaware-minbox.txt

@@ -378,7 +378,7 @@ tailscale.com/cmd/tailscaled dependencies: (generated by github.com/tailscale/de
         internal/nettrace                                            from net+
         internal/oserror                                             from io/fs+
         internal/poll                                                from net+
-        internal/profilerecord                                       from runtime+
+        internal/profilerecord                                       from runtime
         internal/race                                                from internal/runtime/maps+
         internal/reflectlite                                         from context+
         internal/runtime/atomic                                      from internal/runtime/exithook+
@@ -435,7 +435,6 @@ tailscale.com/cmd/tailscaled dependencies: (generated by github.com/tailscale/de
         regexp/syntax                                                from regexp
         runtime                                                      from crypto/internal/fips140+
         runtime/debug                                                from github.com/klauspost/compress/zstd+
-        runtime/pprof                                                from tailscale.com/ipn/ipnlocal+
         slices                                                       from crypto/tls+
         sort                                                         from compress/flate+
         strconv                                                      from compress/flate+
@@ -443,7 +442,7 @@ tailscale.com/cmd/tailscaled dependencies: (generated by github.com/tailscale/de
         sync                                                         from compress/flate+
         sync/atomic                                                  from context+
         syscall                                                      from crypto/internal/sysrand+
-        text/tabwriter                                               from runtime/pprof+
+        text/tabwriter                                               from github.com/peterbourgon/ff/v3/ffcli+
         time                                                         from compress/gzip+
         unicode                                                      from bytes+
         unicode/utf16                                                from crypto/x509+

cmd/tailscaled/deps_test.go

@@ -256,6 +256,7 @@ func TestMinTailscaledWithCLI(t *testing.T) {
 	badSubstrs := []string{
 		"cbor",
 		"hujson",
+		"pprof",
 	}
 	deptest.DepChecker{
 		GOOS:   "linux",

ipn/ipnlocal/c2n_pprof.go

@@ -1,7 +1,7 @@
 // Copyright (c) Tailscale Inc & AUTHORS
 // SPDX-License-Identifier: BSD-3-Clause
 
-//go:build !js && !wasm
+//go:build !js && !wasm && !ts_omit_debug
 
 package ipnlocal
 

wgengine/watchdog.go

@@ -1,7 +1,7 @@
 // Copyright (c) Tailscale Inc & AUTHORS
 // SPDX-License-Identifier: BSD-3-Clause
 
-//go:build !js
+//go:build !js && !ts_omit_debug
 
 package wgengine
 

wgengine/watchdog_js.go

@@ -1,17 +0,0 @@
-// Copyright (c) Tailscale Inc & AUTHORS
-// SPDX-License-Identifier: BSD-3-Clause
-
-//go:build js
-
-package wgengine
-
-import "tailscale.com/net/dns/resolver"
-
-type watchdogEngine struct {
-	Engine
-	wrap Engine
-}
-
-func (e *watchdogEngine) GetResolver() (r *resolver.Resolver, ok bool) {
-	return nil, false
-}

wgengine/watchdog_omit.go

@@ -0,0 +1,8 @@
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
+
+//go:build js || ts_omit_debug
+
+package wgengine
+
+func NewWatchdog(e Engine) Engine { return e }