Implement the filesystem proxy. This allows the FileRef tests to pass in the...

ppapi/proxy/ppb_url_response_info_proxy.h

Index: ppapi/proxy/ppb_url_response_info_proxy.h
===================================================================
--- ppapi/proxy/ppb_url_response_info_proxy.h	(revision 75471)
+++ ppapi/proxy/ppb_url_response_info_proxy.h	(working copy)
@@ -17,6 +17,7 @@
 namespace pp {
 namespace proxy {
 
+class PPBFileRef_CreateInfo;
 class SerializedVarReturnValue;
 
 class PPB_URLResponseInfo_Proxy : public InterfaceProxy {
@@ -47,7 +48,7 @@
                         int32_t property,
                         SerializedVarReturnValue result);
   void OnMsgGetBodyAsFileRef(HostResource response,
-                             HostResource* file_ref_result);
+                             PPBFileRef_CreateInfo* result);
 
   DISALLOW_COPY_AND_ASSIGN(PPB_URLResponseInfo_Proxy);
 };