Add a Content API around BrowserChildProcessHost, similar to what was done with ChildProcessHost....

content/public/browser/browser_child_process_host_delegate.h

+// 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.
+
+#ifndef CONTENT_PUBLIC_BROWSER_BROWSER_CHILD_PROCESS_HOST_DELEGATE_H_
+#define CONTENT_PUBLIC_BROWSER_BROWSER_CHILD_PROCESS_HOST_DELEGATE_H_
+#pragma once
+
+#include "content/common/content_export.h"
+#include "ipc/ipc_channel.h"
+
+namespace content {
+
+// Interface that all users of BrowserChildProcessHost need to provide.
+class CONTENT_EXPORT BrowserChildProcessHostDelegate
+    : public IPC::Channel::Listener {
+ public:
+  virtual ~BrowserChildProcessHostDelegate() {}
+
+  // Delegates return true if it's ok to shut down the child process (which is
+  // the default return value). The exception is if the host is in the middle of
+  // sending a request to the process, in which case the other side might think
+  // it's ok to shutdown, when really it's not.
+  virtual bool CanShutdown();
+
+  // Called when the process has been started.
+  virtual void OnProcessLaunched() {}
+
+  // Called if the process crashed. |exit_code| is the status returned when the
+  // process crashed (for posix, as returned from waitpid(), for Windows, as
+  // returned from GetExitCodeProcess()).
+  virtual void OnProcessCrashed(int exit_code) {}
+};
+
+};  // namespace content
+
+#endif  // CONTENT_PUBLIC_BROWSER_BROWSER_CHILD_PROCESS_HOST_DELEGATE_H_