This adds some plumbing for propagating the reason for a renderer's death

chrome/browser/browser_child_process_host.cc

Index: chrome/browser/browser_child_process_host.cc
diff --git a/chrome/browser/browser_child_process_host.cc b/chrome/browser/browser_child_process_host.cc
index a317f26ca2bac3846dc619dc67915fc9904ee0d4..35660aba736c6dcb2f9badd0e267af5e010f7362 100644
--- a/chrome/browser/browser_child_process_host.cc
+++ b/chrome/browser/browser_child_process_host.cc
@@ -131,18 +131,34 @@ void BrowserChildProcessHost::Notify(NotificationType type) {
       BrowserThread::UI, FROM_HERE, new ChildNotificationTask(type, this));
 }
 
-bool BrowserChildProcessHost::DidChildCrash() {
-  return child_process_->DidProcessCrash();
+base::TerminationStatus BrowserChildProcessHost::GetChildTerminationStatus(
+    int* exit_code) {
+  return child_process_->GetChildTerminationStatus(exit_code);
 }
 
 void BrowserChildProcessHost::OnChildDied() {
   if (handle() != base::kNullProcessHandle) {
-    bool did_crash = DidChildCrash();
-    if (did_crash) {
-      OnProcessCrashed();
-      // Report that this child process crashed.
-      Notify(NotificationType::CHILD_PROCESS_CRASHED);
-      UMA_HISTOGRAM_COUNTS("ChildProcess.Crashes", this->type());
+    int exit_code;
+    base::TerminationStatus status = GetChildTerminationStatus(&exit_code);
+    switch (status) {
+      case base::TERMINATION_STATUS_PROCESS_CRASHED: {
+        OnProcessCrashed(exit_code);
+
+        // Report that this child process crashed.
+        Notify(NotificationType::CHILD_PROCESS_CRASHED);
+        UMA_HISTOGRAM_COUNTS("ChildProcess.Crashes", this->type());
+        break;
+      }
+      case base::TERMINATION_STATUS_PROCESS_WAS_KILLED: {
+        OnProcessWasKilled(exit_code);
+
+        // Report that this child process was killed.
+        Notify(NotificationType::CHILD_PROCESS_WAS_KILLED);
+        UMA_HISTOGRAM_COUNTS("ChildProcess.Kills", this->type());
+        break;
+      }
+      default:
+        break;
     }
     // Notify in the main loop of the disconnection.
     Notify(NotificationType::CHILD_PROCESS_HOST_DISCONNECTED);