Switch stability reports to use the crashed version's details

components/browser_watcher/stability_report.proto

Index: components/browser_watcher/stability_report.proto
diff --git a/components/browser_watcher/stability_report.proto b/components/browser_watcher/stability_report.proto
index 72c8fc20c1bb15452276888be525d1d8eda3b061..abb857fb66d34d93e3cffadc34f504b803514380 100644
--- a/components/browser_watcher/stability_report.proto
+++ b/components/browser_watcher/stability_report.proto
@@ -78,7 +78,7 @@ message TypedValue {
 }
 
 // An activity represents information about something of interest on a thread.
-// Next id: 10
+// Next id: 11
 message Activity {
   enum Type {
     UNKNOWN = 0;
@@ -116,6 +116,8 @@ message Activity {
   // A unique identifier for a process.
   optional int64 process_id = 8;
 
+  // Tag id 10 is reserved.
+
   // A key-value store.
   map<string, TypedValue> user_data = 9;
 }