Notification: Add notification proto.

This CL adds a proto to serialize dynamically generated data to schedule
a notification and display later.

Bug: 930968
Change-Id: Iadd7ca8f820097db2dee47d664ddbf0ca4528cbf
Reviewed-on: https://chromium-review.googlesource.com/c/1468341
Commit-Queue: Xing Liu <xingliu@chromium.org>
Reviewed-by: Peter Beverloo <peter@chromium.org>
Reviewed-by: David Trainor <dtrainor@chromium.org>
Cr-Commit-Position: refs/heads/master@{#635812}

chrome/browser/BUILD.gn

@@ -1826,6 +1826,7 @@ jumbo_split_static_library("browser") {
     "//chrome/browser/metrics:expired_histograms_array",
     "//chrome/browser/metrics/variations:chrome_ui_string_overrider_factory",
     "//chrome/browser/net:probe_message_proto",
+    "//chrome/browser/notifications",
     "//chrome/browser/profiling_host",
     "//chrome/browser/push_messaging:budget_proto",
     "//chrome/browser/resource_coordinator:mojo_bindings",

chrome/browser/notifications/BUILD.gn

+# Copyright 2019 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.
+
+group("notifications") {
+  deps = [
+    "//chrome/browser/notifications/proto",
+  ]
+}

chrome/browser/notifications/proto/BUILD.gn

+# Copyright 2019 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.
+
+import("//third_party/protobuf/proto_library.gni")
+
+proto_library("proto") {
+  sources = [
+    "icon.proto",
+    "notification_data.proto",
+  ]
+}

chrome/browser/notifications/proto/OWNERS

+dtrainor@chromium.org
+peter@chromium.org
+xingliu@chromium.org

chrome/browser/notifications/proto/icon.proto

+// Copyright 2019 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 notifications;
+
+// Stores the icon used in a notification. The icon is in PNG format. Each time
+// we should only load one icon asynchronously into memory.
+// Next tag: 3
+message Icon {
+  // Unique identifier of the icon. Serves as the key to load the icon proto
+  // from database.
+  optional string uuid = 1;
+
+  // Raw data of the icon to show in the notification in PNG format.
+  optional bytes icon = 2;
+}
\ No newline at end of file

chrome/browser/notifications/proto/notification_data.proto

+// Copyright 2019 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 notifications;
+
+// Stores a scheduled notification which will be displayed in the future.
+// Next tag: 6
+// TODO(xingliu): Add other fields if necessary.
+message NotificationData {
+  // Identifier of the notification.
+  optional string id = 1;
+
+  // Title of the notification.
+  optional string title = 2;
+
+  // Body text of the notification.
+  optional string message = 3;
+
+  // The unique identifier of the icon of the notification. Each time we should
+  // only load one icon asynchronously into memory with the uuid.
+  optional string icon_uuid = 4;
+
+  // URL of the web site responsible for showing the notification.
+  optional string url = 5;
+}
\ No newline at end of file