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

chrome/browser/browser_child_process_host.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/browser_child_process_host.h"
 
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
@@ skipping 121 matching lines @@
 void BrowserChildProcessHost::ForceShutdown() {
   Singleton<ChildProcessList>::get()->remove(this);
   ChildProcessHost::ForceShutdown();
 }
 
 void BrowserChildProcessHost::Notify(NotificationType type) {
   BrowserThread::PostTask(
       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) {

[brettw, 2010/12/03 01:01:54]

Random suggestion: I would probably write
  switch (GetChildTerminationStatus(&exit_code)) {
to save a line.

+      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);
   }
   ChildProcessHost::OnChildDied();
 }
 
 bool BrowserChildProcessHost::InterceptMessageFromChild(
     const IPC::Message& msg) {
   bool msg_is_ok = true;
@@ skipping 52 matching lines @@
 
     return *iterator_;
   } while (true);
 
   return NULL;
 }
 
 bool BrowserChildProcessHost::Iterator::Done() {
   return iterator_ == Singleton<ChildProcessList>::get()->end();
 }