Add extra parameter to BrowserChildProcessCrashed to pass the exit_code at time of crash/termination

chrome/browser/metrics/chrome_stability_metrics_provider.cc

Index: chrome/browser/metrics/chrome_stability_metrics_provider.cc
diff --git a/chrome/browser/metrics/chrome_stability_metrics_provider.cc b/chrome/browser/metrics/chrome_stability_metrics_provider.cc
index a5e31427ff092e2820a66d63b41e5c6df3e83c35..9b6b126b1498990529ee737df8f91a7f42687dee 100644
--- a/chrome/browser/metrics/chrome_stability_metrics_provider.cc
+++ b/chrome/browser/metrics/chrome_stability_metrics_provider.cc
@@ -236,7 +236,8 @@ void ChromeStabilityMetricsProvider::Observe(
 }
 
 void ChromeStabilityMetricsProvider::BrowserChildProcessCrashed(
-    const content::ChildProcessData& data) {
+    const content::ChildProcessData& data,
+    int exit_code) {
 #if defined(ENABLE_PLUGINS)
   // Exclude plugin crashes from the count below because we report them via
   // a separate UMA metric.