Provide a way for RenderProcessHosts to register themselves in the global host map.

content/browser/renderer_host/render_process_host_impl.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 CONTENT_BROWSER_RENDERER_HOST_BROWSER_RENDER_PROCESS_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_BROWSER_RENDER_PROCESS_HOST_IMPL_H_
 #pragma once
 
 #include <map>
 #include <queue>
@@ skipping 97 matching lines @@
   // base::WaitableEventWatcher::Delegate implementation.
   virtual void OnWaitableEventSignaled(
       base::WaitableEvent* waitable_event) OVERRIDE;
 
   // Call this function when it is evident that the child process is actively
   // performing some operation, for example if we just received an IPC message.
   void mark_child_process_activity_time() {
     child_process_activity_time_ = base::TimeTicks::Now();
   }
 
+  // Register/unregister the host identified by the host id in the global host
+  // list.
+  static void RegisterHost(int host_id, content::RenderProcessHost* host);
+  static void UnregisterHost(int host_id);
+
  protected:
   // A proxy for our IPC::Channel that lives on the IO thread (see
   // browser_process.h)
   scoped_ptr<IPC::ChannelProxy> channel_;
 
   // The registered listeners. When this list is empty or all NULL, we should
   // delete ourselves
   IDMap<IPC::Channel::Listener> listeners_;
 
   // The maximum page ID we've ever seen from the renderer process.
@@ skipping 115 matching lines @@
   // filtering for this at the render widget level.
   bool ignore_input_events_;
 
   // Records the last time we regarded the child process active.
   base::TimeTicks child_process_activity_time_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderProcessHostImpl);
 };
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_BROWSER_RENDER_PROCESS_HOST_IMPL_H_