Bound the impact of system instability on chrome instability.

components/browser_watcher/BUILD.gn

Index: components/browser_watcher/BUILD.gn
diff --git a/components/browser_watcher/BUILD.gn b/components/browser_watcher/BUILD.gn
index 2e831c9c8b1d370dc280031ca2bc6089882a08f3..34ce6d499e688bb19221d7c3977a4f56df0617a8 100644
--- a/components/browser_watcher/BUILD.gn
+++ b/components/browser_watcher/BUILD.gn
@@ -68,6 +68,7 @@ if (is_win) {
       ":postmortem_minidump_writer",
       ":stability_data",
       ":stability_report_proto",
+      ":system_session_analyzer",
       "//base",
       "//components/variations",
       "//third_party/crashpad/crashpad/client",
@@ -96,6 +97,18 @@ static_library("stability_data") {
 }
 
 if (is_win) {
+  static_library("system_session_analyzer") {
+    sources = [
+      "system_session_analyzer_win.cc",
+      "system_session_analyzer_win.h",
+    ]
+    deps = [
+      "//base",
+    ]
+    libs = [ "wevtapi.lib" ]
+    ldflags = [ "/DELAYLOAD:wevtapi.dll" ]  # Only used after unclean shutdowns.
+  }
+
   source_set("unit_tests") {
     testonly = true
     sources = [
@@ -103,6 +116,7 @@ if (is_win) {
       "exit_code_watcher_win_unittest.cc",
       "postmortem_minidump_writer_win_unittest.cc",
       "postmortem_report_collector_unittest.cc",
+      "system_session_analyzer_win_unittest.cc",
       "watcher_client_win_unittest.cc",
       "watcher_metrics_provider_win_unittest.cc",
       "window_hang_monitor_win_unittest.cc",
@@ -115,6 +129,7 @@ if (is_win) {
       ":postmortem_report_collector",
       ":stability_data",
       ":stability_report_proto",
+      ":system_session_analyzer",
       "//base",
       "//base/test:test_support",
       "//testing/gmock",
@@ -138,4 +153,14 @@ if (is_win) {
       "//base",
     ]
   }
+
+  executable("fetch_system_session_events") {
+    sources = [
+      "fetch_system_session_events_main_win.cc",
+    ]
+    deps = [
+      ":system_session_analyzer",
+      "//base",
+    ]
+  }
 }