Change configuration of user prefs to use mojo.

services/preferences/public/interfaces/preferences.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.
 
 module prefs.mojom;
 
+import "mojo/common/file_path.mojom";
+import "mojo/common/string16.mojom";
 import "mojo/common/values.mojom";
+import "services/preferences/public/interfaces/tracked_preference_validation_delegate.mojom";
 
 const string kServiceName = "preferences";
 
 // Used for the creation of a PreferencesService and to ensure that the
 // PreferencesServiceClient is bound at creation time.
 interface PreferencesServiceFactory {
   // Creates a PreferencesService bound to the provided |observer|.
   Create(PreferencesServiceClient observer, PreferencesService& service);
 };
 
@@ skipping 33 matching lines @@
     ASYNCHRONOUS_TASK_INCOMPLETE = 10,
   };
 
   [Sync]
   Connect() => (
       ReadError read_error,
       bool read_only,
       mojo.common.mojom.DictionaryValue? preferences,
       PersistentPrefStore? pref_store);
 };
+
+interface ResetOnLoadObserver {
+  OnResetOnLoad();
+};
+
+interface PersistentPrefStoreInit {
+  Init(UserPrefsConfiguration configuration);
+};
+
+union UserPrefsConfiguration {
+  SimpleUserPrefsConfiguration simple_configuration;
+  SegregatedUserPrefsConfiguration segregated_configuration;
+};
+
+struct SimpleUserPrefsConfiguration {
+  mojo.common.mojom.FilePath pref_filename;
+};
+
+struct SegregatedUserPrefsConfiguration {
+  mojo.common.mojom.FilePath unprotected_pref_filename;
+  mojo.common.mojom.FilePath protected_pref_filename;
+  array<TrackedPreferenceMetadata> tracking_configuration;
+  uint64 reporting_ids_count;
+  string seed;
+  string legacy_device_id;
+  mojo.common.mojom.String16 registry_path;
+  TrackedPreferenceValidationDelegate? validation_delegate;
+  ResetOnLoadObserver reset_on_load_observer;
+};
+
+struct TrackedPreferenceMetadata {
+  enum EnforcementLevel { NO_ENFORCEMENT, ENFORCE_ON_LOAD };
+
+  enum PrefTrackingStrategy {
+    // Atomic preferences are tracked as a whole.
+    ATOMIC,
+    // Split preferences are dictionaries for which each top-level entry is
+    // tracked independently. Note: preferences using this strategy must be kept
+    // in sync with TrackedSplitPreferences in histograms.xml.
+    SPLIT,
+  };
+
+  enum ValueType {
+    IMPERSONAL,
+    // The preference value may contain personal information.
+    PERSONAL,
+  };
+
+  uint64 reporting_id;
+  string name;
+  EnforcementLevel enforcement_level;
+  PrefTrackingStrategy strategy;
+  ValueType value_type;
+};