Added PPB function to return default print settings

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 b2787a92ec9aa63ff8b686826998879ec2271ac6..66302675418ab48202da6dc77f573757c6d6eb27 100644
--- a/ppapi/proxy/ppapi_messages.h
+++ b/ppapi/proxy/ppapi_messages.h
@@ -465,6 +465,12 @@ 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 */,