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diff --git a/content/child/npapi/plugin_host.h b/content/child/npapi/plugin_host.h
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+++ b/content/child/npapi/plugin_host.h
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+// 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.
+
+// TODO: Need mechanism to cleanup the static instance
+
+#ifndef CONTENT_CHILD_NPAPI_PLUGIN_HOST_H_
+#define CONTENT_CHILD_NPAPI_PLUGIN_HOST_H_
+
+#include <string>
+#include <vector>
+
+#include "base/memory/ref_counted.h"
+#include "third_party/npapi/bindings/npapi.h"
+#include "third_party/npapi/bindings/nphostapi.h"
+
+namespace content {
+
+// The Plugin Host implements the NPN_xxx functions for NPAPI plugins.
+// These are the functions exposed from the Plugin Host for use
+// by the Plugin.
+//
+// The PluginHost is managed as a singleton.  This isn't strictly
+// necessary, but since the callback functions are all global C
+// functions, there is really no point in having per-instance PluginHosts.
+class PluginHost : public base::RefCounted<PluginHost> {
+ public:
+  // Access the single PluginHost instance.  Callers
+  // must call deref() when finished with the object.
+  static PluginHost* Singleton();
+
+  // The table of functions provided to the plugin.
+  NPNetscapeFuncs* host_functions() { return &host_funcs_; }
+
+  // Helper function for parsing post headers, and applying attributes
+  // to the stream.  NPAPI post data include headers + data combined.
+  // This function parses it out and adds it to the stream in a WebKit
+  // style.
+  static bool SetPostData(const char *buf,
+                          uint32 length,
+                          std::vector<std::string>* names,
+                          std::vector<std::string>* values,
+                          std::vector<char>* body);
+
+  void PatchNPNetscapeFuncs(NPNetscapeFuncs* overrides);
+
+ private:
+  friend class base::RefCounted<PluginHost>;
+
+  virtual ~PluginHost();
+
+  PluginHost();
+  void InitializeHostFuncs();
+  NPNetscapeFuncs host_funcs_;
+  DISALLOW_COPY_AND_ASSIGN(PluginHost);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_CHILD_NPAPI_PLUGIN_HOST_H_