content: Cleanup class/struct forward declarations

content/public/browser/browser_child_process_host.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_H_
 #define CONTENT_PUBLIC_BROWSER_BROWSER_CHILD_PROCESS_HOST_H_
 
 #include "base/environment.h"
 #include "base/memory/shared_memory.h"
 #include "base/process/kill.h"
 #include "base/process/process_handle.h"
 #include "base/strings/string16.h"
 #include "build/build_config.h"
 #include "content/common/content_export.h"
 #include "content/public/common/process_type.h"
 #include "ipc/ipc_sender.h"
 
 #if defined(OS_MACOSX)
 #include "base/process/port_provider_mac.h"
 #endif
 
 namespace base {
 class CommandLine;
-class FilePath;
 class SharedPersistentMemoryAllocator;
 }
 
-namespace service_manager {
-class InterfaceProvider;
-}
-
 namespace content {
 
 class BrowserChildProcessHostDelegate;
 class ChildProcessHost;
 class SandboxedProcessLauncherDelegate;
 struct ChildProcessData;
 
 // This represents child processes of the browser process, i.e. plugins. They
 // will get terminated at browser shutdown.
 class CONTENT_EXPORT BrowserChildProcessHost : public IPC::Sender {
@@ skipping 57 matching lines @@
 
 #if defined(OS_MACOSX)
   // Returns a PortProvider used to get the task port for child processes.
   static base::PortProvider* GetPortProvider();
 #endif
 };
 
 };  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_BROWSER_CHILD_PROCESS_HOST_H_