Add AntiVirus information to the system profile.

components/metrics/proto/system_profile.proto

Index: components/metrics/proto/system_profile.proto
diff --git a/components/metrics/proto/system_profile.proto b/components/metrics/proto/system_profile.proto
index e2b5c19ac15692ce164c5bfe848f3f496a78cb5f..b6d87534e55cc27445d3378411b31788bb2062a0 100644
--- a/components/metrics/proto/system_profile.proto
+++ b/components/metrics/proto/system_profile.proto
@@ -13,7 +13,7 @@ option java_package = "org.chromium.components.metrics";
 
 package metrics;
 
-// Next tag: 23
+// Next tag: 24
 message SystemProfileProto {
   // The time when the client was compiled/linked, in seconds since the epoch.
   optional int64 build_timestamp = 1;
@@ -777,4 +777,33 @@ message SystemProfileProto {
     POLICY_FORCED_ENABLED = 2;
   }
   optional UmaDefaultState uma_default_state = 22;
+
+  enum AntiVirusState {
+    // The security product software is turned on and protecting the user.
+    STATE_ON = 0;
+    // The security product software is turned off and protection is disabled.
+    STATE_OFF = 1;
+    // The security product software is in the snoozed state, temporarily off,
+    // and not actively protecting the computer.
+    STATE_SNOOZED = 2;
+    // The security product software has expired and is no longer actively
+    // protecting the computer.
+    STATE_EXPIRED = 3;
+  }
+
+  // Information about AntiVirus products installed.
+  // Next Tag: 6
+  message AntiVirusProduct {
+    // The product name e.g. "System Center Endpoint Protection".

[Alexei Svitkine (slow), 2016/06/01 20:42:35]

Expand comment to mention that it might not be recorded. Same for the other
string.

[Will Harris, 2016/06/02 20:36:27]

Done.

+    optional string product_name = 1;

[Alexei Svitkine (slow), 2016/06/01 20:42:35]

Nit: Add empty lines between the fields.

[Will Harris, 2016/06/02 20:36:27]

Done.

+    // The hash of the product name.
+    optional fixed32 product_name_hash = 2;
+    // The version of the product, as read from the file information.
+    optional string product_version = 3;
+    // The hash of the product version.
+    optional fixed32 product_version_hash = 4;
+    // The current state of the product.
+    optional AntiVirusState product_state = 5;
+  }
+  repeated AntiVirusProduct antivirus_product = 23;
 }