Collect stability data from global and activity scopes

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 11345c3d0045814f97ad2599c570b45e6839f4af..1d1897fb7ef645921abb5bcbe96162db6706dfab 100644
--- a/components/browser_watcher/stability_report.proto
+++ b/components/browser_watcher/stability_report.proto
@@ -51,8 +51,29 @@ message CodeModule {
   optional string version = 7;
 }
 
-// An activity represents information about something of interest on a thread.
+// A typed value holds values of interest or references to such values.
 // Next id: 9
+message TypedValue {
+  // A reference to a value of interest.
+  message Reference {
+    optional uint64 address = 1;
+    optional int64 size = 2;
+  }
+
+  oneof value {
+    bytes bytes_value = 1;
+    Reference bytes_reference = 2;
+    string string_value = 3;
+    Reference string_reference = 4;
+    string char_value = 5;
+    bool bool_value = 6;
+    int64 signed_value = 7;
+    uint64 unsigned_value = 8;
+  }
+}
+
+// An activity represents information about something of interest on a thread.
+// Next id: 10
 message Activity {
   enum Type {
     UNKNOWN = 0;
@@ -89,6 +110,9 @@ message Activity {
 
   // A unique identifier for a process.
   optional int64 process_id = 8;
+
+  // A key-value store.
+  map<string, TypedValue> user_data = 9;
 }
 
 // The state of a thread.
@@ -122,7 +146,7 @@ message ProcessState {
 // A stability report contains information pertaining to the execution of a
 // single logical instance of a "chrome browser". It is comprised of information
 // about the system state and about the chrome browser's processes.
-// Next id: 4
+// Next id: 5
 message StabilityReport {
   optional SystemState system_state = 1;
   // TODO(manzagop): revisit whether a single repeated field should contain all
@@ -134,4 +158,5 @@ message StabilityReport {
   // TODO(manzagop): if/when reports contain multiple processes, attribute and
   //     relocate these to their process (and perhaps thread).
   repeated string log_messages = 3;
+  map<string, TypedValue> global_data = 4;
 }