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

chrome/service/service_utility_process_host.h

 // Copyright (c) 2011 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 CHROME_SERVICE_SERVICE_UTILITY_PROCESS_HOST_H_
 #define CHROME_SERVICE_SERVICE_UTILITY_PROCESS_HOST_H_
 #pragma once
 
 #include "build/build_config.h"
 
@@ skipping 90 matching lines @@
   // printer. Used on Windows to isolate the service process from printer driver
   // crashes by executing this in a separate process. The process does not run
   // in a sandbox.
   bool StartGetPrinterCapsAndDefaults(const std::string& printer_name);
 
  protected:
   // Allows this method to be overridden for tests.
   virtual FilePath GetUtilityProcessCmd();
 
   // ChildProcessHostDelegate implementation:
-  virtual bool CanShutdown() OVERRIDE;
   virtual void OnChildDisconnected() OVERRIDE;
-  virtual void ShutdownStarted() OVERRIDE;
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
  private:
   // Starts a process.  Returns true iff it succeeded. |exposed_dir| is the
   // path to the exposed to the sandbox. This is ignored if |no_sandbox| is
   // true.
   bool StartProcess(bool no_sandbox, const FilePath& exposed_dir);
 
   // Launch the child process synchronously.
   // TODO(sanjeevr): Determine whether we need to make the launch asynchronous.
@@ skipping 21 matching lines @@
   bool waiting_for_reply_;
   // The path to the temp file where the metafile will be written to.
   FilePath metafile_path_;
   // The temporary folder created for the metafile.
   scoped_ptr<ScopedTempDir> scratch_metafile_dir_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceUtilityProcessHost);
 };
 
 #endif  // CHROME_SERVICE_SERVICE_UTILITY_PROCESS_HOST_H_