New thunk system for Pepper proxy and implementation

ppapi/proxy/ppapi_messages.h

Index: ppapi/proxy/ppapi_messages.h
===================================================================
--- ppapi/proxy/ppapi_messages.h	(revision 84344)
+++ ppapi/proxy/ppapi_messages.h	(working copy)
@@ -573,11 +573,6 @@
                            PP_Size /* size */)
 
 // PPB_Graphics2D.
-IPC_SYNC_MESSAGE_ROUTED3_1(PpapiHostMsg_PPBGraphics2D_Create,
-                           PP_Instance /* instance */,
-                           PP_Size /* size */,
-                           PP_Bool /* is_always_opaque */,
-                           pp::proxy::HostResource /* result */)
 IPC_MESSAGE_ROUTED5(PpapiHostMsg_PPBGraphics2D_PaintImageData,
                     pp::proxy::HostResource /* graphics_2d */,
                     pp::proxy::HostResource /* image_data */,
@@ -595,16 +590,6 @@
 IPC_MESSAGE_ROUTED1(PpapiHostMsg_PPBGraphics2D_Flush,
                     pp::proxy::HostResource /* graphics_2d */)
 
-// PPB_ImageData.
-IPC_SYNC_MESSAGE_ROUTED4_3(PpapiHostMsg_PPBImageData_Create,
-                           PP_Instance /* instance */,
-                           int32 /* format */,
-                           PP_Size /* size */,
-                           PP_Bool /* init_to_zero */,
-                           pp::proxy::HostResource /* result_resource */,
-                           std::string /* image_data_desc */,
-                           pp::proxy::ImageHandle /* result */)
-
 // PPB_Instance.
 IPC_SYNC_MESSAGE_ROUTED1_1(PpapiHostMsg_PPBInstance_GetWindowObject,
                            PP_Instance /* instance */,
@@ -798,3 +783,18 @@
                            int64 /* object_class */,
                            int64 /* object_data */,
                            pp::proxy::SerializedVar /* result */)
+
+IPC_SYNC_MESSAGE_ROUTED3_1(PpapiHostMsg_ResourceCreation_Graphics2D,
+                           PP_Instance /* instance */,
+                           PP_Size /* size */,
+                           PP_Bool /* is_always_opaque */,
+                           pp::proxy::HostResource /* result */)
+IPC_SYNC_MESSAGE_ROUTED4_3(PpapiHostMsg_ResourceCreation_ImageData,
+                           PP_Instance /* instance */,
+                           int32 /* format */,
+                           PP_Size /* size */,
+                           PP_Bool /* init_to_zero */,
+                           pp::proxy::HostResource /* result_resource */,
+                           std::string /* image_data_desc */,
+                           pp::proxy::ImageHandle /* result */)
+