runtime/pprof/internal/profile: move internal/pprof/profile here

Nothing needs internal/pprof anymore except the runtime/pprof tests.
Move the package here to prevent new dependencies.

Change-Id: Ia119af91cc2b980e0fa03a15f46f69d7f71d2926
Reviewed-on: https://go-review.googlesource.com/37165
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Michael Matloob <matloob@golang.org>

src/cmd/trace/pprof.go

@@ -9,13 +9,14 @@ package main
 import (
 	"bufio"
 	"fmt"
-	"internal/pprof/profile"
 	"internal/trace"
 	"io"
 	"io/ioutil"
 	"net/http"
 	"os"
 	"os/exec"
+
+	"github.com/google/pprof/profile"
 )
 
 func init() {

src/go/build/deps_test.go

@@ -258,13 +258,13 @@ var pkgDeps = map[string][]string{
 	"index/suffixarray":        {"L4", "regexp"},
 	"internal/singleflight":    {"sync"},
 	"internal/trace":           {"L4", "OS"},
-	"internal/pprof/profile":    {"L4", "OS", "compress/gzip", "regexp"},
 	"math/big":                 {"L4", "math/bits"},
 	"mime":                     {"L4", "OS", "syscall", "internal/syscall/windows/registry"},
 	"mime/quotedprintable":     {"L4"},
 	"net/internal/socktest":    {"L4", "OS", "syscall"},
 	"net/url":                  {"L4"},
 	"plugin":                   {"L0", "OS", "CGO"},
+	"runtime/pprof/internal/profile": {"L4", "OS", "compress/gzip", "regexp"},
 	"testing/internal/testdeps":      {"L4", "runtime/pprof", "regexp"},
 	"text/scanner":                   {"L4", "OS"},
 	"text/template/parse":            {"L4"},

src/runtime/pprof/internal/profile/profile.go

@@ -4,6 +4,9 @@
 
 // Package profile provides a representation of profile.proto and
 // methods to encode/decode profiles in this format.
+//
+// This package is only for testing runtime/pprof.
+// It is not used by production Go programs.
 package profile
 
 import (

src/runtime/pprof/pprof_test.go

@@ -9,13 +9,13 @@ package pprof
 import (
 	"bytes"
 	"fmt"
-	"internal/pprof/profile"
 	"internal/testenv"
 	"math/big"
 	"os"
 	"os/exec"
 	"regexp"
 	"runtime"
+	"runtime/pprof/internal/profile"
 	"strings"
 	"sync"
 	"testing"

src/runtime/pprof/proto_test.go

@@ -7,10 +7,10 @@ package pprof
 import (
 	"bytes"
 	"encoding/json"
-	"internal/pprof/profile"
 	"io/ioutil"
 	"reflect"
 	"runtime"
+	"runtime/pprof/internal/profile"
 	"testing"
 )
 

src/runtime/pprof/protomem_test.go

@@ -6,8 +6,8 @@ package pprof
 
 import (
 	"bytes"
-	"internal/pprof/profile"
 	"runtime"
+	"runtime/pprof/internal/profile"
 	"testing"
 )
 

test/locklinear.go

@@ -10,7 +10,10 @@ package main
 
 import (
 	"fmt"
+	"log"
+	"os"
 	"runtime"
+	"runtime/pprof"
 	"sync"
 	"time"
 )
@@ -64,6 +67,13 @@ func checkLinear(typ string, tries int, f func(n int)) {
 const offset = 251 // known size of runtime hash table
 
 func main() {
+	f, err := os.Create("lock.prof")
+	if err != nil {
+		log.Fatal(err)
+	}
+	pprof.StartCPUProfile(f)
+	defer pprof.StopCPUProfile()
+
 	checkLinear("lockone", 1000, func(n int) {
 		ch := make(chan int)
 		locks := make([]sync.RWMutex, offset+1)