Implement the file chooser as a new resource "host"

ppapi/proxy/ppb_file_ref_proxy.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 PPAPI_PROXY_PPB_FILE_REF_PROXY_H_
 #define PPAPI_PROXY_PPB_FILE_REF_PROXY_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "ppapi/c/pp_module.h"
 #include "ppapi/c/pp_resource.h"
 #include "ppapi/c/pp_time.h"
 #include "ppapi/proxy/interface_proxy.h"
+#include "ppapi/proxy/ppapi_proxy_export.h"
 #include "ppapi/proxy/proxy_non_thread_safe_ref_count.h"
 #include "ppapi/utility/completion_callback_factory.h"
 
 namespace ppapi {
 
 class HostResource;
 struct PPB_FileRef_CreateInfo;
 
 namespace proxy {
 
 class SerializedVarReturnValue;
 
-class PPB_FileRef_Proxy : public InterfaceProxy {
+class PPAPI_PROXY_EXPORT PPB_FileRef_Proxy
+    : public NON_EXPORTED_BASE(InterfaceProxy) {
  public:
   explicit PPB_FileRef_Proxy(Dispatcher* dispatcher);
   virtual ~PPB_FileRef_Proxy();
 
   static PP_Resource CreateProxyResource(PP_Resource file_system,
                                          const char* path);
   static PP_Resource CreateProxyResource(
       const PPB_FileRef_CreateInfo& serialized);
 
   // InterfaceProxy implementation.
   virtual bool OnMessageReceived(const IPC::Message& msg);
 
   // Takes a resource in the host and converts it into a serialized file ref
   // "create info" for reconstitution in the plugin. This struct contains all
   // the necessary information about the file ref.
   //
-  // This function is not static because it needs access to the particular
-  // dispatcher and host interface.
-  //
   // Various PPAPI functions return file refs from various interfaces, so this
   // function is public so anybody can send a file ref.
-  void SerializeFileRef(PP_Resource file_ref,
-                        PPB_FileRef_CreateInfo* result);
+  static void SerializeFileRef(PP_Resource file_ref,
+                               PPB_FileRef_CreateInfo* result);
 
   // Creates a plugin resource from the given CreateInfo sent from the host.
   // The value will be the result of calling SerializeFileRef on the host.
   // This represents passing the resource ownership to the plugin. This
   // function also checks the validity of the result and returns 0 on failure.
   //
   // Various PPAPI functions return file refs from various interfaces, so this
   // function is public so anybody can receive a file ref.
   static PP_Resource DeserializeFileRef(
       const PPB_FileRef_CreateInfo& serialized);
@@ skipping 34 matching lines @@
   pp::CompletionCallbackFactory<PPB_FileRef_Proxy,
                                 ProxyNonThreadSafeRefCount> callback_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PPB_FileRef_Proxy);
 };
 
 }  // namespace proxy
 }  // namespace ppapi
 
 #endif  // PPAPI_PROXY_PPB_FILE_REF_PROXY_H_