vendor: upgrade "golang.org/x/time"

Signed-off-by: Gyuho Lee <gyuhox@gmail.com>

Gopkg.lock

@@ -318,9 +318,10 @@
   version = "v0.3.0"
 
 [[projects]]
+  branch = "master"
   name = "golang.org/x/time"
   packages = ["rate"]
-  revision = "c06e80d9300e4443158a03817b8a8cb37d230320"
+  revision = "fbb02b2291d28baffd63558aa44b4b56f178d650"
 
 [[projects]]
   name = "google.golang.org/genproto"

vendor/golang.org/x/time/rate/rate.go

@@ -6,7 +6,6 @@
 package rate
 
 import (
-	"context"
 	"fmt"
 	"math"
 	"sync"
@@ -213,8 +212,19 @@ func (lim *Limiter) ReserveN(now time.Time, n int) *Reservation {
 	return &r
 }
 
+// contextContext is a temporary(?) copy of the context.Context type
+// to support both Go 1.6 using golang.org/x/net/context and Go 1.7+
+// with the built-in context package. If people ever stop using Go 1.6
+// we can remove this.
+type contextContext interface {
+	Deadline() (deadline time.Time, ok bool)
+	Done() <-chan struct{}
+	Err() error
+	Value(key interface{}) interface{}
+}
+
 // Wait is shorthand for WaitN(ctx, 1).
-func (lim *Limiter) Wait(ctx context.Context) (err error) {
+func (lim *Limiter) wait(ctx contextContext) (err error) {
 	return lim.WaitN(ctx, 1)
 }
 
@@ -222,7 +232,7 @@ func (lim *Limiter) Wait(ctx context.Context) (err error) {
 // It returns an error if n exceeds the Limiter's burst size, the Context is
 // canceled, or the expected wait time exceeds the Context's Deadline.
 // The burst limit is ignored if the rate limit is Inf.
-func (lim *Limiter) WaitN(ctx context.Context, n int) (err error) {
+func (lim *Limiter) waitN(ctx contextContext, n int) (err error) {
 	if n > lim.burst && lim.limit != Inf {
 		return fmt.Errorf("rate: Wait(n=%d) exceeds limiter's burst %d", n, lim.burst)
 	}
@@ -243,8 +253,12 @@ func (lim *Limiter) WaitN(ctx context.Context, n int) (err error) {
 	if !r.ok {
 		return fmt.Errorf("rate: Wait(n=%d) would exceed context deadline", n)
 	}
-	// Wait
-	t := time.NewTimer(r.DelayFrom(now))
+	// Wait if necessary
+	delay := r.DelayFrom(now)
+	if delay == 0 {
+		return nil
+	}
+	t := time.NewTimer(delay)
 	defer t.Stop()
 	select {
 	case <-t.C:

vendor/golang.org/x/time/rate/rate_go16.go

@@ -0,0 +1,21 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !go1.7
+
+package rate
+
+import "golang.org/x/net/context"
+
+// Wait is shorthand for WaitN(ctx, 1).
+func (lim *Limiter) Wait(ctx context.Context) (err error) {
+	return lim.waitN(ctx, 1)
+}
+
+// WaitN blocks until lim permits n events to happen.
+// It returns an error if n exceeds the Limiter's burst size, the Context is
+// canceled, or the expected wait time exceeds the Context's Deadline.
+func (lim *Limiter) WaitN(ctx context.Context, n int) (err error) {
+	return lim.waitN(ctx, n)
+}

vendor/golang.org/x/time/rate/rate_go17.go

@@ -0,0 +1,21 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build go1.7
+
+package rate
+
+import "context"
+
+// Wait is shorthand for WaitN(ctx, 1).
+func (lim *Limiter) Wait(ctx context.Context) (err error) {
+	return lim.waitN(ctx, 1)
+}
+
+// WaitN blocks until lim permits n events to happen.
+// It returns an error if n exceeds the Limiter's burst size, the Context is
+// canceled, or the expected wait time exceeds the Context's Deadline.
+func (lim *Limiter) WaitN(ctx context.Context, n int) (err error) {
+	return lim.waitN(ctx, n)
+}