Fix a bug where killing pages doesn't yield a sad-tab

content/browser/child_process_launcher.cc

 // Copyright (c) 2012 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 "content/browser/child_process_launcher.h"
 
 #include <utility>  // For std::pair.
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 447 matching lines @@
     // Process is already gone, so return the cached termination status.
     if (exit_code)
       *exit_code = context_->exit_code_;
     return context_->termination_status_;
   }
 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
   if (context_->zygote_) {
     context_->termination_status_ = ZygoteHostImpl::GetInstance()->
         GetTerminationStatus(handle, known_dead, &context_->exit_code_);
   } else
+#elif defined(OS_MACOSX)
+  if (known_dead) {
+    context_->termination_status_ =
+        base::GetKnownDeadTerminationStatus(handle, &context_->exit_code_);
+  } else
 #endif
   {
     context_->termination_status_ =
         base::GetTerminationStatus(handle, &context_->exit_code_);
   }
 
   if (exit_code)
     *exit_code = context_->exit_code_;
 
   // POSIX: If the process crashed, then the kernel closed the socket
@@ skipping 16 matching lines @@
           GetHandle(), background));
 }
 
 void ChildProcessLauncher::SetTerminateChildOnShutdown(
   bool terminate_on_shutdown) {
   if (context_.get())
     context_->set_terminate_child_on_shutdown(terminate_on_shutdown);
 }
 
 }  // namespace content