PPAPI/NaCl: Make ImageData for NaCl just use shared memory

ppapi/proxy/ppapi_messages.h

 // Copyright (c) 2012 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.
 
 // Multiply-included message header, no traditional include guard.
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/file_path.h"
@@ skipping 891 matching lines @@
 
 // PPB_ImageData.
 IPC_SYNC_MESSAGE_ROUTED4_3(PpapiHostMsg_PPBImageData_Create,
                            PP_Instance /* instance */,
                            int32 /* format */,
                            PP_Size /* size */,
                            PP_Bool /* init_to_zero */,
                            ppapi::HostResource /* result_resource */,
                            std::string /* image_data_desc */,
                            ppapi::proxy::ImageHandle /* result */)
+IPC_SYNC_MESSAGE_ROUTED4_3(PpapiHostMsg_PPBImageData_CreateNaCl,
+                           PP_Instance /* instance */,
+                           int32 /* format */,
+                           PP_Size /* size */,
+                           PP_Bool /* init_to_zero */,
+                           ppapi::HostResource /* result_resource */,
+                           std::string /* image_data_desc */,
+                           base::SharedMemoryHandle /* result */)
 
 // PPB_Instance.
 IPC_SYNC_MESSAGE_ROUTED1_1(PpapiHostMsg_PPBInstance_GetWindowObject,
                            PP_Instance /* instance */,
                            ppapi::proxy::SerializedVar /* result */)
 IPC_SYNC_MESSAGE_ROUTED1_1(PpapiHostMsg_PPBInstance_GetOwnerElementObject,
                            PP_Instance /* instance */,
                            ppapi::proxy::SerializedVar /* result */)
 IPC_SYNC_MESSAGE_ROUTED2_1(PpapiHostMsg_PPBInstance_BindGraphics,
                            PP_Instance /* instance */,
@@ skipping 507 matching lines @@
 
 // File chooser.
 IPC_MESSAGE_CONTROL0(PpapiHostMsg_FileChooser_Create)
 IPC_MESSAGE_CONTROL4(PpapiHostMsg_FileChooser_Show,
                      bool /* save_as */,
                      bool /* open_multiple */,
                      std::string /* suggested_file_name */,
                      std::vector<std::string> /* accept_mime_types */)
 IPC_MESSAGE_CONTROL1(PpapiPluginMsg_FileChooser_ShowReply,
                      std::vector<ppapi::PPB_FileRef_CreateInfo> /* files */)