Update APIs to use new Google cloud paths.

common/cloudlogging/client.go

 // Copyright 2015 The LUCI Authors. All rights reserved.
 // Use of this source code is governed under the Apache License, Version 2.0
 // that can be found in the LICENSE file.
 
 package cloudlogging
 
 import (
         "errors"
         "flag"
         "fmt"
         "net/http"
         "os"
 
+        "cloud.google.com/go/compute/metadata"
         cloudlog "google.golang.org/api/logging/v1beta3"
-        "google.golang.org/cloud/compute/metadata"
 )
 
 // DefaultResourceType is used by NewClient if ClientOptions doesn't specify
 // ResourceType.
 const (
         // GCEService is service name for GCE instances.
         GCEService = "compute.googleapis.com"
 
         // DefaultResourceType is used as the ResourceType value if Options doesn't
         // specify a ResourceType.
@@ skipping 190 matching lines @@
                 c.writeError(err.Error())
         }
         return err
 }
 
 func (c *clientImpl) writeError(f string, args ...interface{}) {
         if c.ErrorWriter != nil {
                 c.ErrorWriter(fmt.Sprintf(f, args...))
         }
 }