Added PPB function to return default print settings

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 447 matching lines @@
 IPC_SYNC_MESSAGE_ROUTED2_1(PpapiMsg_PPPPrinting_PrintPages,
                            PP_Instance /* instance */,
                            std::vector<PP_PrintPageNumberRange_Dev> /* pages */,
                            ppapi::HostResource /* result */)
 IPC_MESSAGE_ROUTED1(PpapiMsg_PPPPrinting_End,
                     PP_Instance /* instance */)
 IPC_SYNC_MESSAGE_ROUTED1_1(PpapiMsg_PPPPrinting_IsScalingDisabled,
                            PP_Instance /* instance */,
                            bool /* result */)
 
+// PPB_Printing.
+IPC_SYNC_MESSAGE_ROUTED1_2(PpapiMsg_PPBPrinting_GetDefaultPrintSettings,

[yzshen1, 2012/06/12 23:14:34]

It should be called Ppapi*Host*Msg and put in the PpapiHostMsg section below.

And you could see that messages are ordered by the corresponding interface name,
alphabetically. In this case, you may want to put it in the PPB_Instance group.

[raymes, 2012/06/13 18:23:46]

Done.

+                           PP_Instance /* instance */,
+                           std::string /* settings_string */,

[yzshen1, 2012/06/12 23:14:34]

nit: usually you don't need to have the type in the parameter name.

[raymes, 2012/06/13 18:23:47]

Done.

+                           bool /* result */)
+
 // PPP_TextInput.
 IPC_MESSAGE_ROUTED2(PpapiMsg_PPPTextInput_RequestSurroundingText,
                    PP_Instance /* instance */,
                    uint32_t /* desired_number_of_characters */)
 
 // PPB_URLLoader
 // (Messages from browser to plugin to notify it of changes in state.)
 IPC_MESSAGE_ROUTED3(PpapiMsg_PPBURLLoader_ReadResponseBody_Ack,
                     ppapi::HostResource /* loader */,
                     int32 /* result */,
@@ skipping 831 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)