govendor: Update 6 GCLOUD dependencies (#525)

* govendor: Update github.com/golang/protobuf

* govendor: Update github.com/gobwas/glob github.com/google/go-github

* govendor: Update 3 github.com/robertkrimen/otto

* govendor: Update 4 golang.org/x

golang.org/x/crypto
golang.org/x/net
golang.org/x/sys
golang.org/x/text
golang.org/x/time
golang.org/x/crypto

* govendor: Update 5 github.com/aws/aws-sdk-go

* govendor: Update 6 GCLOUD dependencies

vendor/google.golang.org/appengine/appengine.go

@@ -60,10 +60,34 @@ func IsDevAppServer() bool {
 	return internal.IsDevAppServer()
 }
 
+// IsStandard reports whether the App Engine app is running in the standard
+// environment. This includes both the first generation runtimes (<= Go 1.9)
+// and the second generation runtimes (>= Go 1.11).
+func IsStandard() bool {
+	return internal.IsStandard()
+}
+
+// IsFlex reports whether the App Engine app is running in the flexible environment.
+func IsFlex() bool {
+	return internal.IsFlex()
+}
+
+// IsAppEngine reports whether the App Engine app is running on App Engine, in either
+// the standard or flexible environment.
+func IsAppEngine() bool {
+	return internal.IsAppEngine()
+}
+
+// IsSecondGen reports whether the App Engine app is running on the second generation
+// runtimes (>= Go 1.11).
+func IsSecondGen() bool {
+	return internal.IsSecondGen()
+}
+
 // NewContext returns a context for an in-flight HTTP request.
 // This function is cheap.
 func NewContext(req *http.Request) context.Context {
-	return WithContext(context.Background(), req)
+	return internal.ReqContext(req)
 }
 
 // WithContext returns a copy of the parent context
@@ -73,8 +97,6 @@ func WithContext(parent context.Context, req *http.Request) context.Context {
 	return internal.WithContext(parent, req)
 }
 
-// TODO(dsymonds): Add a Call function here? Otherwise other packages can't access internal.Call.
-
 // BlobKey is a key for a blobstore blob.
 //
 // Conceptually, this type belongs in the blobstore package, but it lives in