Control data saver pingback reporting fraction with protobuf

components/data_reduction_proxy/proto/client_config.proto

 // Copyright 2015 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.
 
 syntax = "proto2";
 
 option optimize_for = LITE_RUNTIME;
 
 package data_reduction_proxy;
 
 // The client configuration information for using the Data Saver service.
 message ClientConfig {
   // An opaque per-session key assigned by the server which permits use of the
   // Data Saver HTTP proxy servers.
   optional string session_key = 1;
   // The time at which the client should request a new configuration. The
   // session_key is guaranteed to be valid through this time and may be valid
   // for some time thereafter.
   optional Timestamp refresh_time = 2;
   // The proxy configuration the client should use to connect to the Data Saver
   // service.
   optional ProxyConfig proxy_config = 3;
   // The duration after which the client should request a new configuration. The
   // session_key is guaranteed to be valid through this time and may be valid
   // for some time thereafter. If both refresh_duration and refresh_time are
   // present, refresh_duration should take priority.
   optional Duration refresh_duration = 4;
+  // Configuration information for reporting pageload metrics.
+  optional PageloadMetricsConfig pageload_metrics_config = 5;
+}
+
+// The configuration for reporting pageload metrics.
+message PageloadMetricsConfig {
+  // The fraction of pageloads for which to report pageload metrics.
+  optional float reporting_fraction = 1;
 }
 
 // N.B.:
 // The configuration service that sends the ClientConfig uses Timestamp and
 // Duration to conform to Google API standards. These proto messages should
 // live in a shared location in the Chromium tree, but for now we duplicate
 // them here.
 
 // A Timestamp represents a point in time independent of any time zone
 // or calendar, represented as seconds and fractions of seconds at
@@ skipping 57 matching lines @@
   optional string host = 2;
   // The port number for the proxy server.
   optional int32 port = 3;
 }
 
 // Request object to create a client configuration object.
 message CreateClientConfigRequest {
   // A previous per-session key that was assigned by the service.
   optional string session_key = 1;
 }