Cleanup: Remove unneeded forward declarations in webkit/plugins/.

webkit/plugins/npapi/plugin_host.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.
 
 // TODO: Need mechanism to cleanup the static instance
 
 #ifndef WEBKIT_PLUGINS_NPAPI_PLUGIN_HOST_H_
 #define WEBKIT_PLUGINS_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 webkit {
 namespace npapi {
 
-class PluginInstance;
-
 // 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();
+  static PluginHost* Singleton();
 
   // The table of functions provided to the plugin.
-  NPNetscapeFuncs *host_functions() { return &host_funcs_; }
+  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 npapi
 }  // namespace webkit
 
 #endif  // WEBKIT_PLUGINS_NPAPI_PLUGIN_HOST_H_