Add resource message call and reply infrastructure.

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 19 matching lines @@
 #include "ppapi/c/pp_rect.h"
 #include "ppapi/c/pp_resource.h"
 #include "ppapi/c/pp_size.h"
 #include "ppapi/c/pp_time.h"
 #include "ppapi/c/private/ppb_host_resolver_private.h"
 #include "ppapi/c/private/ppb_net_address_private.h"
 #include "ppapi/c/private/ppb_tcp_socket_private.h"
 #include "ppapi/c/private/ppp_flash_browser_operations.h"
 #include "ppapi/proxy/ppapi_param_traits.h"
 #include "ppapi/proxy/ppapi_proxy_export.h"
+#include "ppapi/proxy/resource_message_params.h"
 #include "ppapi/proxy/serialized_flash_menu.h"
 #include "ppapi/proxy/serialized_structs.h"
 #include "ppapi/shared_impl/ppapi_preferences.h"
 #include "ppapi/shared_impl/ppb_device_ref_shared.h"
 #include "ppapi/shared_impl/ppb_input_event_shared.h"
 #include "ppapi/shared_impl/ppb_network_list_private_shared.h"
 #include "ppapi/shared_impl/ppb_url_request_info_shared.h"
 #include "ppapi/shared_impl/ppb_view_shared.h"
 #include "ppapi/shared_impl/ppp_flash_browser_operations_shared.h"
 #include "ppapi/shared_impl/private/ppb_host_resolver_shared.h"
@@ skipping 1327 matching lines @@
 
 // PPB_X509Certificate_Private
 IPC_SYNC_MESSAGE_CONTROL1_2(PpapiHostMsg_PPBX509Certificate_ParseDER,
                             std::vector<char> /* der */,
                             bool /* succeeded */,
                             ppapi::PPB_X509Certificate_Fields /* result */)
 
 // PPB_Font.
 IPC_SYNC_MESSAGE_CONTROL0_1(PpapiHostMsg_PPBFont_GetFontFamilies,
                             std::string /* result */)
+
 #endif  // !defined(OS_NACL)
+
+//-----------------------------------------------------------------------------
+// Resource call/reply messages.
+//
+// These are the new-style resource implementations where the resource is only
+// implemented in the proxy and "resource messages" are sent between this and a
+// host object.

[bbudge, 2012/06/19 20:40:31]

Maybe a little explanation about 'nesting'? Which message is nested in which. Or
is nesting an existing concept that is explained somewhere else?

+
+// Notification that a resource has been created in the plugin. The nested
+// message will be resource-type-specific.
+IPC_MESSAGE_CONTROL3(PpapiHostMsg_ResourceCreated,
+                     ppapi::proxy::ResourceMessageCallParams /* call_params */,
+                     PP_Instance  /* instance */,
+                     IPC::Message /* nested_msg */)
+
+// Notification that a resource has been destroyed in the plugin.
+IPC_MESSAGE_CONTROL1(PpapiHostMsg_ResourceDestroyed,
+                     PP_Resource /* resource */)
+
+// A resource call is a request from the plugin to the host. It may or may not
+// require a reply, depending on the params. The nested message will be
+// resource-type-specific.
+IPC_MESSAGE_CONTROL2(PpapiHostMsg_ResourceCall,
+                     ppapi::proxy::ResourceMessageCallParams /* call_params */,
+                     IPC::Message /* nested_msg */)
+
+// A resource reply is a response to a ResourceCall from a host to the
+// plugin. The resource ID + sequence number in the params will correspond to
+// that of the previous ResourceCall.
+IPC_MESSAGE_CONTROL2(
+    PpapiPluginMsg_ResourceReply,
+    ppapi::proxy::ResourceMessageReplyParams /* reply_params */,
+    IPC::Message /* nested_msg */)