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

chrome/browser/metrics/chrome_stability_metrics_provider.h

Index: chrome/browser/metrics/chrome_stability_metrics_provider.h
diff --git a/chrome/browser/metrics/chrome_stability_metrics_provider.h b/chrome/browser/metrics/chrome_stability_metrics_provider.h
index 89913c19382e7d3ba13ba381a8e63b0a808fcafa..94da7d2cbbfc41e99205ce8ef07fd72a297d612d 100644
--- a/chrome/browser/metrics/chrome_stability_metrics_provider.h
+++ b/chrome/browser/metrics/chrome_stability_metrics_provider.h
@@ -48,7 +48,8 @@ class ChromeStabilityMetricsProvider
 
   // content::BrowserChildProcessObserver:
   void BrowserChildProcessCrashed(
-      const content::ChildProcessData& data) override;
+      const content::ChildProcessData& data,
+      int exit_code) override;
 
   // Logs the initiation of a page load and uses |web_contents| to do
   // additional logging of the type of page loaded.