ARC: Add BootType parameter to ReportBootProgress() in metrics.mojom

components/arc/common/metrics.mojom

 // Copyright 2016 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.
+// Next MinVersion: 2
 
 module arc.mojom;
 
+[Extensible]
+enum BootType {
+  UNKNOWN = 0,

[Luis Héctor Chávez, 2017/05/25 18:24:30]

nit: Add a comment that this is only used for compatibility reasons with Version
0 instances.

[Yusuke Sato, 2017/05/25 19:50:50]

Done.

+  // This is for the very first (opt-in) boot.
+  FIRST_BOOT = 1,
+  // This is for the first boot after Chrome OS update which also updates the
+  // ARC image.
+  FIRST_BOOT_AFTER_UPDATE = 2,
+  // This is for regular boot.
+  REGULAR_BOOT = 3,
+};
+
 // Describes a boot progress event.
 struct BootProgressEvent {
   // Name of the boot progress event in Android. Currently there are
   // 11 boot progress events found in Android source repository:
   //   system/core/logcat/event.logtags
   //   frameworks/base/services/core/java/com/android/server/am/
   //       EventLogTags.logtags
   //   frameworks/base/services/core/java/com/android/server/
   //       EventLogTags.logtags
   string event;
 
   // Timestamp of the event in uptime obtained in ARC. The uptime
   // is from clock source MONOTONIC_CLOCK since Chrome OS boots up.
   // Therefore, we need to calibrate the correct elapsed time of the
   // event by comparing the uptime with the ARC start time from
   // the same clock source MONOTONIC_CLOCK in session manager.
   int64 uptimeMillis;
 };
 
+// Next method ID: 1
 interface MetricsHost {
   // Report boot progress events from ARC instance.
-  ReportBootProgress@0(array<BootProgressEvent> events);
+  ReportBootProgress@0(array<BootProgressEvent> events,
+                       [MinVersion=1] BootType boot_type);
 };
 
+// Next method ID: 1
 interface MetricsInstance {
   Init@0(MetricsHost host_ptr);
 };