[Chromecast] Add Cast Assistant product type.

components/metrics/proto/cast_logs.proto

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // Cast-enabled device specific log data included in ChromeUserMetricsExtension.
 
 syntax = "proto2";
 
 option optimize_for = LITE_RUNTIME;
 option java_outer_classname = "CastLogsProtos";
 option java_package = "org.chromium.components.metrics";
 
 package metrics;
 
 // Next tag: 7
 message CastLogsProto {
   // Cast specific device information.
   // Next tag: 6
   message CastDeviceInfo {
     // The product type of Cast device sent from Cast-enabled devices.
     // Next tag: 5
     enum CastProductType {
       CAST_PRODUCT_TYPE_UNKNOWN = 0;
       CAST_PRODUCT_TYPE_CHROMECAST = 1;
       CAST_PRODUCT_TYPE_TV = 2;
       CAST_PRODUCT_TYPE_AUDIO = 3;
       CAST_PRODUCT_TYPE_ANDROID_TV = 4;
+      CAST_PRODUCT_TYPE_ASSISTANT = 5;
     }
     optional CastProductType type = 1;
 
     // The hardware revision of each product.
     optional string hardware_revision = 2;
 
     // The manufacturer of Cast device, this value is empty when the device
     // is manufactured by Google.
     optional string manufacturer = 3;
 
@@ skipping 159 matching lines @@
   }
   optional CastDeviceMutableInfo cast_device_mutable_info = 5;
 
   // Unique identifier that is randomly generated on first setup, on re-setup
   // (FDR), and when user opted-in from opted-out status. If user is opted-out
   // then this field should not be set.
   // This is used for joining logs from Cast sender SDK to evaluate Cast
   // sender/receiver communication quality.
   optional fixed64 receiver_metrics_id = 6;
 }