vendor: update all dependencies

vendor/cloud.google.com/go/logging/internal/testing/equal.go

@@ -0,0 +1,42 @@
+/*
+Copyright 2017 Google Inc. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package testing
+
+import (
+	"fmt"
+
+	"github.com/golang/protobuf/proto"
+)
+
+// Compare two payloads, assuming they are both proto.Messages
+// or both strings.
+func PayloadEqual(a, b interface{}) bool {
+	if a == nil && b == nil {
+		return true
+	}
+	if a == nil || b == nil {
+		return false
+	}
+	switch a := a.(type) {
+	case proto.Message:
+		return proto.Equal(a, b.(proto.Message))
+	case string:
+		return a == b.(string)
+	default:
+		panic(fmt.Sprintf("payloadEqual: unexpected type %T", a))
+	}
+}