Implement the file chooser as a new resource "host"

ppapi/proxy/ppapi_messages.h

Index: ppapi/proxy/ppapi_messages.h
diff --git a/ppapi/proxy/ppapi_messages.h b/ppapi/proxy/ppapi_messages.h
index cd54ae96c3f12e95a911dd7ecc6c7082b59db0cc..1977de709903c7779da7d9d2a6600ad1d5eaaef5 100644
--- a/ppapi/proxy/ppapi_messages.h
+++ b/ppapi/proxy/ppapi_messages.h
@@ -37,6 +37,7 @@
 #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"
@@ -1384,4 +1385,34 @@ IPC_SYNC_MESSAGE_CONTROL1_2(PpapiHostMsg_PPBX509Certificate_ParseDER,
 // PPB_Font.
 IPC_SYNC_MESSAGE_CONTROL0_1(PpapiHostMsg_PPBFont_GetFontFamilies,
                             std::string /* result */)
+
+//-----------------------------------------------------------------------------
+
+IPC_MESSAGE_CONTROL3(PpapiHostMsg_ResourceCreated,
+                     ppapi::proxy::ResourceMessageCallParams /* call_params */,
+                     PP_Instance  /* instance */,
+                     IPC::Message /* nested_msg */)
+IPC_MESSAGE_CONTROL1(PpapiHostMsg_ResourceDestroyed,
+                     PP_Resource /* resource */)
+
+IPC_MESSAGE_CONTROL2(PpapiHostMsg_ResourceCall,
+                     ppapi::proxy::ResourceMessageCallParams /* call_params */,
+                     IPC::Message /* nested_msg */)
+
+IPC_MESSAGE_CONTROL2(
+    PpapiPluginMsg_ResourceReply,
+    ppapi::proxy::ResourceMessageReplyParams /* reply_params */,
+    IPC::Message /* nested_msg */)
+
+//-----------------------------------------------------------------------------
+
+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 */)
+
 #endif  // !defined(OS_NACL)