Started on Resource class.

src/shared/ppapi_proxy/plugin_image_data.cc

 /*
  * Copyright 2010 The Native Client Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can
  * be found in the LICENSE file.
  */
 
 #include "native_client/src/shared/ppapi_proxy/plugin_image_data.h"
 
 #include <stdio.h>
 #include <string.h>
@@ skipping 53 matching lines @@
           (init_to_zero == PP_TRUE),
           &resource);
   if (retval == NACL_SRPC_RESULT_OK) {
     return static_cast<PP_Resource>(resource);
   } else {
     return kInvalidResourceId;
   }
 }
 
 PP_Bool IsImageData(PP_Resource resource) {
-  int32_t result;
-  NaClSrpcError retval =
-      PpbImageDataRpcClient::PPB_ImageData_IsImageData(
-          GetMainSrpcChannel(),
-          static_cast<int64_t>(resource),
-          &result);
-  if (retval == NACL_SRPC_RESULT_OK) {
-    return (result ? PP_TRUE : PP_FALSE);
-  } else {
-    return PP_FALSE;
-  }
+  return PluginResource::GetAs<PluginImageData>(resource).get()
+      ? PP_TRUE : PP_FALSE;
 }
 
 PP_Bool Describe(PP_Resource resource,
                  struct PP_ImageDataDesc* desc) {
   int32_t result;
   nacl_abi_size_t desc_size = kPpImageDataDescBytes;
   NaClSrpcError retval =
       PpbImageDataRpcClient::PPB_ImageData_Describe(
           GetMainSrpcChannel(),
           static_cast<int64_t>(resource),
@@ skipping 31 matching lines @@
     Create,
     IsImageData,
     Describe,
     Map,
     Unmap,
   };
   return &intf;
 }
 
 }  // namespace ppapi_proxy