Aggregate device activity, and report per-day activity in device status reports.

chrome/browser/policy/proto/device_management_backend.proto

 // Copyright (c) 2012 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 enterprise_management;
 
@@ skipping 211 matching lines @@
   // The policy fetch response.
   repeated PolicyFetchResponse response = 3;
 }
 
 message TimePeriod {
   // [timestamp] is milli seconds since Epoch in UTC timezone.
   optional int64 start_timestamp = 1;
   optional int64 end_timestamp = 2;
 }
 
+message ActiveTimePeriod {
+  optional TimePeriod time_period = 1;
+  optional int32 active_duration = 2;
+}
+
 // This captures launch events for one app/extension or other installments.
 message InstallableLaunch {
   optional string install_id = 1;
 
   // Time duration where this report covers. These are required
   // and the record will be ignored if not set.
   optional TimePeriod duration = 2;
 
   // Client will send at most 50 timestamps to DM. All the rest
   // launch activities will be summed into the total count.
   // We will distribute the count evenly among the time span when
   // doing time based aggregation.
   repeated int64 timestamp = 3;
   optional int64 total_count = 4;
 }
 
 // Report device level status.
 message DeviceStatusReportRequest {
   optional string os_version = 1;
   optional string firmware_version = 2;
 
   // "Validated", "Dev". Same as verified mode.
   // If the mode is unknown, this field should not be set.
   optional string boot_mode = 3;
 
-  // Device active times collection since last report rpc call.
-  repeated TimePeriod active_time = 4;
+  // No longer used -- use active_period instead.
+  repeated TimePeriod active_time = 4 [deprecated=true];
 
   // The browser version string as shown in the About dialog.
   optional string browser_version = 5;
+
+  // A list of periods when the device was active, aggregated by day.
+  repeated ActiveTimePeriod active_period = 6;
 }
 
 // Report session (a user on one device) level status.
 message SessionStatusReportRequest {
   // Installed apps for this user on this device.
   repeated string installed_app_id = 1;
 
   // Installed extensions for this user on this device.
   repeated string installed_extension_id = 2;
 
@@ skipping 150 matching lines @@
 
   // Device status report response.
   optional DeviceStatusReportResponse device_status_report_response = 6;
 
   // Session status report response.
   optional SessionStatusReportResponse session_status_report_response = 7;
 
   // Auto-enrollment detection response.
   optional DeviceAutoEnrollmentResponse auto_enrollment_response = 8;
 }