Shell: Remove various child process type stuff.

shell/app_child_process_host.h

 // Copyright 2014 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 SHELL_APP_CHILD_PROCESS_HOST_H_
 #define SHELL_APP_CHILD_PROCESS_HOST_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
 #include "mojo/edk/embedder/channel_info_forward.h"
 #include "shell/app_child_process.mojom.h"
 #include "shell/child_process_host.h"
 
 namespace mojo {
 namespace shell {
 
-// A subclass of |ChildProcessHost| to host a |TYPE_APP| child process, which
-// runs a single app (loaded from the file system).
+// A subclass of |ChildProcessHost| to host an app child process, which runs a
+// single app (loaded from the file system).
 //
 // Note: After |Start()|, |StartApp| must be called and this object must
 // remained alive until the |on_app_complete| callback is called.
 class AppChildProcessHost : public ChildProcessHost,
                             public ChildProcessHost::Delegate {
  public:
   explicit AppChildProcessHost(Context* context);
   ~AppChildProcessHost() override;
 
   // See |AppChildController|:
@@ skipping 17 matching lines @@
   embedder::ChannelInfo* channel_info_;
   AppChildController::StartAppCallback on_app_complete_;
 
   DISALLOW_COPY_AND_ASSIGN(AppChildProcessHost);
 };
 
 }  // namespace shell
 }  // namespace mojo
 
 #endif  // SHELL_APP_CHILD_PROCESS_HOST_H_