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diff --git a/chrome/browser/nacl_process_host.h b/chrome/browser/nacl_process_host.h
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+++ b/chrome/browser/nacl_process_host.h
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+// Copyright (c) 2009 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_BROWSER_NACL_PROCESS_HOST_H_
+#define CHROME_BROWSER_NACL_PROCESS_HOST_H_
+
+#include "build/build_config.h"
+#include "chrome/common/child_process_host.h"
+#include "chrome/common/nacl_types.h"
+#include "native_client/src/shared/imc/nacl_imc.h"
+
+class ResourceMessageFilter;
+
+// Represents the browser side of the browser <--> NaCl communication
+// channel. There will be one NaClProcessHost per NaCl process
+// The browser is responsible for starting the NaCl process
+// when requested by the renderer.
+// After that, most of the communication is directly between NaCl plugin
+// running in the renderer and NaCl processes.
+class NaClProcessHost : public ChildProcessHost {
+ public:
+  explicit NaClProcessHost(ResourceDispatcherHost *resource_dispatcher_host);
+  ~NaClProcessHost() {}
+
+  // Initialize the new NaCl process, returning true on success.
+  bool Launch(ResourceMessageFilter* renderer_msg_filter,
+              const int descriptor,
+              nacl::FileDescriptor *handle);
+
+  virtual void OnMessageReceived(const IPC::Message& msg);
+
+ private:
+  bool LaunchSelLdr(ResourceMessageFilter* renderer_msg_filter,
+                    const int descriptor,
+                    const nacl::Handle handle);
+
+  bool SendStartMessage(base::ProcessHandle process,
+                        int descriptor,
+                        nacl::Handle handle);
+
+  // ResourceDispatcherHost::Receiver implementation:
+  virtual URLRequestContext* GetRequestContext(
+      uint32 request_id,
+      const ViewHostMsg_Resource_Request& request_data);
+
+  virtual bool CanShutdown() { return true; }
+
+ private:
+  ResourceDispatcherHost* resource_dispatcher_host_;
+
+  DISALLOW_COPY_AND_ASSIGN(NaClProcessHost);
+};
+
+#endif  // CHROME_BROWSER_NACL_PROCESS_HOST_H_