Update metrics_protos from upstream

Bug:785306,743089

Change-Id: I4e13b4d4c2bcd81ca54c7fa7c5133fe046a53043
Reviewed-on: https://chromium-review.googlesource.com/850842
Commit-Queue: Steven Holte <holte@chromium.org>
Reviewed-by: Alexei Svitkine <asvitkine@chromium.org>
Cr-Commit-Position: refs/heads/master@{#527109}

third_party/metrics_proto/README.chromium

 Name: Metrics Protos
-Version: 171200293
-Date: 2017/10/02
+Version: 180820879
+Date: 2018/01/04
 License: BSD
 Security Critical: Yes
 

third_party/metrics_proto/reporting_info.proto

@@ -9,7 +9,7 @@ option optimize_for = LITE_RUNTIME;
 package metrics;
 
 // Extra information attached to reports by client at upload time.
-// Next tag: 3
+// Next tag: 5
 message ReportingInfo {
   // Number of times upload of the current report has been attempted.
   optional int32 attempt_count = 1;

third_party/metrics_proto/system_profile.proto

@@ -486,7 +486,7 @@ message SystemProfileProto {
   // Figures that can be used to generate application stability metrics.
   // All values are counts of events since the last time that these
   // values were reported.
-  // Next tag: 28
+  // Next tag: 29
   message Stability {
     // Total amount of time that the program was running, in seconds,
     // since the last time a log was recorded, as measured using a client-side
@@ -548,6 +548,11 @@ message SystemProfileProto {
     // The number of times that it didn't exit cleanly (which we assume to be
     // mostly crashes).
     optional int32 crash_count = 16;
+    // Android only. The number of times Chrome didn't exit cleanly and the GMS
+    // Core version had not changed from the last session. This is a subset of
+    // |crash_count| where we exclude unclean exits that are likely caused by
+    // GMS Core updates.
+    optional int32 crash_count_without_gms_core_update = 28;
 
     // The number of times the program began, but did not complete, the shutdown
     // process.  (For example, this may occur when Windows is shutting down, and

third_party/metrics_proto/ukm/source.proto

@@ -9,11 +9,27 @@ option optimize_for = LITE_RUNTIME;
 package ukm;
 
 // Source contains data related to a top-level navigation.
-// Next tag: 8
+// Next tag: 9
 message Source {
   // An identifier for the source. This should be unique within a session.
   optional int64 id = 1;
 
+  // Holds data about a URL seen by the client.
+  message UrlInfo {
+    // The URL seen by the client.
+    optional string url = 1;
+
+    // Number of URLs seen for this source before the current URL.
+    // If unset, it’s equivalent to the count of the UrlInfo before it + 1,
+    // or 0 if it’s the first UrlInfo.
+    optional int32 previous_url_count = 2;
+  }
+
+  // Data about each URL associated with the source_id within the record's
+  // scope, in the order that the URLs were encountered. Data may include full
+  // or partial redirect chains for main frame navigations.
+  repeated UrlInfo urls = 8;
+
   // The URL of the source, as recorded in history. If this URL has not been
   // discovered by Google's crawler, it should not be recorded.
   optional string url = 2;