Platform-specific prune state storage.

chrome/browser/safe_browsing/incident_reporting/state_store_data.proto

+// Copyright 2015 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 safe_browsing;
+
+message StateStoreData {
+  message Incidents {
+    // The set of (key,digest) pairs for incidents of a specific type.
+    // This is wire-compatible with map<string, uint32> key_to_digest = 1;
+    message KeyDigestMapFieldEntry {
+      optional string key = 1;
+      optional uint32 digest = 2;
+    }
+    repeated KeyDigestMapFieldEntry key_to_digest = 1;
+  }
+  // The set of all (key,digest) pairs for all incident types reported.
+  // This is wire-compatible with map<int32, Incidents> type_to_incidents = 1;
+  message TypeIncidentsMapFieldEntry {
+    optional int32 type = 1;
+    optional Incidents incidents = 2;
+  }
+  repeated TypeIncidentsMapFieldEntry type_to_incidents = 1;
+}