GCM Checkin implementation with unit tests and protobufs

google_apis/gcm/protocol/android_checkin.proto

Index: google_apis/gcm/protocol/android_checkin.proto
diff --git a/google_apis/gcm/protocol/android_checkin.proto b/google_apis/gcm/protocol/android_checkin.proto
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+// 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.
+//
+// Logging information for Android "checkin" events (automatic, periodic
+// requests made by Android devices to the server).
+
+syntax = "proto2";
+
+option optimize_for = LITE_RUNTIME;
+option retain_unknown_fields = true;
+package checkin_proto;
+
+// Build characteristics unique to the Chrome browser, and Chrome OS
+message ChromeBuildProto {
+  enum Platform {
+    PLATFORM_WIN = 1;
+    PLATFORM_MAC = 2;
+    PLATFORM_LINUX = 3;
+    PLATFORM_CROS = 4;
+    PLATFORM_IOS = 5;
+    // Just a placeholder. Likely don't need it due to the presence of the
+    // Android GCM on phone/tablet devices.
+    PLATFORM_ANDROID = 6;
+  }
+
+  enum Channel {
+    CHANNEL_STABLE = 1;
+    CHANNEL_BETA = 2;
+    CHANNEL_DEV = 3;
+    CHANNEL_CANARY = 4;
+    CHANNEL_UNKNOWN = 5;  // for tip of tree or custom builds
+  }
+
+  // The platform of the device.
+  optional Platform platform = 1;
+
+  // The Chrome instance's version.
+  optional string chrome_version = 2;
+
+  // The Channel (build type) of Chrome.
+  optional Channel channel = 3;
+}
+
+// Information sent by the device in a "checkin" request.
+message AndroidCheckinProto {
+  // Miliseconds since the Unix epoch of the device's last successful checkin.
+  optional int64 last_checkin_msec = 2;
+
+  // The current MCC+MNC of the mobile device's current cell.
+  optional string cell_operator = 6;
+
+  // The MCC+MNC of the SIM card (different from operator if the
+  // device is roaming, for instance).
+  optional string sim_operator = 7;
+
+  // The device's current roaming state (reported starting in eclair builds).
+  // Currently one of "{,not}mobile-{,not}roaming", if it is present at all.
+  optional string roaming = 8;
+
+  // For devices supporting multiple user profiles (which may be
+  // supported starting in jellybean), the ordinal number of the
+  // profile that is checking in.  This is 0 for the primary profile
+  // (which can't be changed without wiping the device), and 1,2,3,...
+  // for additional profiles (which can be added and deleted freely).
+  optional int32 user_number = 9;
+
+  // Class of device.  Indicates the type of build proto
+  // (IosBuildProto/ChromeBuildProto/AndroidBuildProto)
+  // That is included in this proto
+  optional DeviceType type = 12 [default = DEVICE_ANDROID_OS];
+
+  // For devices running MCS on Chrome, build-specific characteristics
+  // of the browser.  There are no hardware aspects (except for ChromeOS).
+  // This will only be populated for Chrome builds/ChromeOS devices
+  optional checkin_proto.ChromeBuildProto chrome_build = 13;
+
+  // Note: Some of the Android specific optional fields were skipped to limit
+  // the protobuf definition.
+  // Next 14
+}
+
+// enum values correspond to the type of device.
+// Used in the AndroidCheckinProto and Device proto.
+enum DeviceType {
+  // Android Device
+  DEVICE_ANDROID_OS = 1;
+
+  // Apple IOS device
+  DEVICE_IOS_OS = 2;
+
+  // Chrome browser - Not Chrome OS.  No hardware records.
+  DEVICE_CHROME_BROWSER = 3;
+
+  // Chrome OS
+  DEVICE_CHROME_OS = 4;
+}