Make BrowserMessageFilter not derive from IPC::ChannelProxy::MessageFilter. This allows us to hide …

content/browser/browser_child_process_host_impl.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_BROWSER_BROWSER_CHILD_PROCESS_HOST_IMPL_H_
 #define CONTENT_BROWSER_BROWSER_CHILD_PROCESS_HOST_IMPL_H_
 
 #include <list>
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/process/process.h"
 #include "base/synchronization/waitable_event_watcher.h"
 #include "content/browser/child_process_launcher.h"
 #include "content/browser/power_monitor_message_broadcaster.h"
 #include "content/public/browser/browser_child_process_host.h"
 #include "content/public/browser/child_process_data.h"
 #include "content/public/common/child_process_host_delegate.h"
 
 namespace content {
 
 class BrowserChildProcessHostIterator;
 class BrowserChildProcessObserver;
+class BrowserMessageFilter;
 
 // Plugins/workers and other child processes that live on the IO thread use this
 // class. RenderProcessHostImpl is the main exception that doesn't use this
 /// class because it lives on the UI thread.
 class CONTENT_EXPORT BrowserChildProcessHostImpl
     : public BrowserChildProcessHost,
       public NON_EXPORTED_BASE(ChildProcessHostDelegate),
       public ChildProcessLauncher::Client {
  public:
   BrowserChildProcessHostImpl(
@@ skipping 29 matching lines @@
   // Removes this host from the host list. Calls ChildProcessHost::ForceShutdown
   void ForceShutdown();
 
   // Callers can reduce the BrowserChildProcess' priority.
   void SetBackgrounded(bool backgrounded);
 
   // Controls whether the child process should be terminated on browser
   // shutdown. Default is to always terminate.
   void SetTerminateChildOnShutdown(bool terminate_on_shutdown);
 
+  // Adds an IPC message filter.
+  void AddFilter(BrowserMessageFilter* filter);
+
   // Called when an instance of a particular child is created in a page.
   static void NotifyProcessInstanceCreated(const ChildProcessData& data);
 
   BrowserChildProcessHostDelegate* delegate() const { return delegate_; }
 
   typedef std::list<BrowserChildProcessHostImpl*> BrowserChildProcessList;
  private:
   friend class BrowserChildProcessHostIterator;
   friend class BrowserChildProcessObserver;
 
@@ skipping 29 matching lines @@
   // Watches to see if the child process exits before the IPC channel has
   // been connected. Thereafter, its exit is determined by an error on the
   // IPC channel.
   base::WaitableEventWatcher early_exit_watcher_;
 #endif
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_BROWSER_CHILD_PROCESS_HOST_IMPL_H_