Update golang dependencies

vendor/google.golang.org/api/CONTRIBUTORS

@@ -46,5 +46,7 @@ Johan Euphrosine <proppy@google.com>
 Kostik Shtoyk <kostik@google.com>
 Michael McGreevy <mcgreevy@golang.org>
 Nick Craig-Wood <nickcw@gmail.com>
+Ross Light <light@google.com>
+Sarah Adams <shadams@google.com>
 Scott Van Woudenberg <scottvw@google.com>
 Takashi Matsuo <tmatsuo@google.com>

vendor/google.golang.org/api/gensupport/header.go

@@ -0,0 +1,22 @@
+// 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.
+
+package gensupport
+
+import (
+	"fmt"
+	"runtime"
+	"strings"
+)
+
+// GoogleClientHeader returns the value to use for the x-goog-api-client
+// header, which is used internally by Google.
+func GoogleClientHeader(generatorVersion, clientElement string) string {
+	elts := []string{"gl-go/" + strings.Replace(runtime.Version(), " ", "_", -1)}
+	if clientElement != "" {
+		elts = append(elts, clientElement)
+	}
+	elts = append(elts, fmt.Sprintf("gdcl/%s", generatorVersion))
+	return strings.Join(elts, " ")
+}

vendor/google.golang.org/api/gensupport/jsonfloat.go

@@ -0,0 +1,57 @@
+// Copyright 2016 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 gensupport
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"math"
+)
+
+// JSONFloat64 is a float64 that supports proper unmarshaling of special float
+// values in JSON, according to
+// https://developers.google.com/protocol-buffers/docs/proto3#json. Although
+// that is a proto-to-JSON spec, it applies to all Google APIs.
+//
+// The jsonpb package
+// (https://github.com/golang/protobuf/blob/master/jsonpb/jsonpb.go) has
+// similar functionality, but only for direct translation from proto messages
+// to JSON.
+type JSONFloat64 float64
+
+func (f *JSONFloat64) UnmarshalJSON(data []byte) error {
+	var ff float64
+	if err := json.Unmarshal(data, &ff); err == nil {
+		*f = JSONFloat64(ff)
+		return nil
+	}
+	var s string
+	if err := json.Unmarshal(data, &s); err == nil {
+		switch s {
+		case "NaN":
+			ff = math.NaN()
+		case "Infinity":
+			ff = math.Inf(1)
+		case "-Infinity":
+			ff = math.Inf(-1)
+		default:
+			return fmt.Errorf("google.golang.org/api/internal: bad float string %q", s)
+		}
+		*f = JSONFloat64(ff)
+		return nil
+	}
+	return errors.New("google.golang.org/api/internal: data not float or string")
+}

vendor/google.golang.org/api/gensupport/retry.go

@@ -1,3 +1,17 @@
+// 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 gensupport
 
 import (