Added is_jailbroken boolean flag to OS protobuf.

components/metrics/proto/system_profile.proto

 // 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.
 //
 // Stores information about the user's brower and system configuration.
 // The system configuration fields are recorded once per client session.
 
 syntax = "proto2";
 
 option optimize_for = LITE_RUNTIME;
@@ skipping 62 matching lines @@
   // Information on the user's operating system.
   message OS {
     // The user's operating system.
     optional string name = 1;
 
     // The version of the OS.  The meaning of this field is OS-dependent.
     optional string version = 2;
 
     // The fingerprint of the build.  This field is used only on Android.
     optional string fingerprint = 3;
+
+    // Whether the version of iOS appears to be "jailbroken". This field is
+    // used only on iOS. Chrome for iOS detects whether device contains a
+    // DynamicLibraries/ directory. It's a necessary but insufficient indicator
+    // of whether the operating system has been jailbroken.
+    optional bool is_jailbroken = 4;
   }
   optional OS os = 5;
 
   // Next tag for Hardware: 16
   // Information on the user's hardware.
   message Hardware {
     // The CPU architecture (x86, PowerPC, x86_64, ...)
     optional string cpu_architecture = 1;
 
     // The amount of RAM present on the system, in megabytes.
@@ skipping 620 matching lines @@
   // then HAS_OFFSTORE is reported. This should be kept in sync with the
   // corresponding enum in chrome/browser/metrics/extensions_metrics_provider.cc
   enum ExtensionsState {
     NO_EXTENSIONS = 0;
     NO_OFFSTORE_VERIFIED = 1;
     NO_OFFSTORE_UNVERIFIED = 2;
     HAS_OFFSTORE = 3;
   }
   optional ExtensionsState offstore_extensions_state = 19;
 }