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..b898e48fb93dba6f9e08687d89cc7b069fe02870 100644
--- a/ppapi/proxy/ppapi_messages.h
+++ b/ppapi/proxy/ppapi_messages.h
@@ -61,6 +61,9 @@ IPC_ENUM_TRAITS(PP_InputEvent_Type)
 IPC_ENUM_TRAITS(PP_NetAddressFamily_Private)
 IPC_ENUM_TRAITS(PP_NetworkListType_Private)
 IPC_ENUM_TRAITS(PP_NetworkListState_Private)
+IPC_ENUM_TRAITS(PP_PrintOrientation_Dev)
+IPC_ENUM_TRAITS(PP_PrintOutputFormat_Dev)
+IPC_ENUM_TRAITS(PP_PrintScalingOption_Dev)
 IPC_ENUM_TRAITS(PP_TextInput_Type)
 IPC_ENUM_TRAITS(PP_VideoDecodeError_Dev)
 IPC_ENUM_TRAITS(PP_VideoDecoder_Profile)
@@ -112,6 +115,17 @@ IPC_STRUCT_TRAITS_BEGIN(PP_HostResolver_Private_Hint)
   IPC_STRUCT_TRAITS_MEMBER(flags)
 IPC_STRUCT_TRAITS_END()
 
+IPC_STRUCT_TRAITS_BEGIN(PP_PrintSettings_Dev)
+  IPC_STRUCT_TRAITS_MEMBER(printable_area)
+  IPC_STRUCT_TRAITS_MEMBER(content_area)
+  IPC_STRUCT_TRAITS_MEMBER(paper_size)
+  IPC_STRUCT_TRAITS_MEMBER(dpi)
+  IPC_STRUCT_TRAITS_MEMBER(orientation)
+  IPC_STRUCT_TRAITS_MEMBER(print_scaling_option)
+  IPC_STRUCT_TRAITS_MEMBER(grayscale)
+  IPC_STRUCT_TRAITS_MEMBER(format)
+IPC_STRUCT_TRAITS_END()
+
 IPC_STRUCT_TRAITS_BEGIN(ppapi::DeviceRefData)
   IPC_STRUCT_TRAITS_MEMBER(type)
   IPC_STRUCT_TRAITS_MEMBER(name)
@@ -891,6 +905,10 @@ IPC_MESSAGE_ROUTED1(PpapiHostMsg_PPBInstance_LockMouse,
                     PP_Instance /* instance */)
 IPC_MESSAGE_ROUTED1(PpapiHostMsg_PPBInstance_UnlockMouse,
                     PP_Instance /* instance */)
+IPC_SYNC_MESSAGE_ROUTED1_2(PpapiHostMsg_PPBPInstance_GetDefaultPrintSettings,
+                           PP_Instance /* instance */,
+                           PP_PrintSettings_Dev /* settings */,
+                           bool /* result */)
 IPC_SYNC_MESSAGE_ROUTED2_1(PpapiHostMsg_PPBInstance_ResolveRelativeToDocument,
                            PP_Instance /* instance */,
                            ppapi::proxy::SerializedVar /* relative */,