Move margin processing code to the browser process.

chrome/common/print_messages.h

Index: chrome/common/print_messages.h
diff --git a/chrome/common/print_messages.h b/chrome/common/print_messages.h
index a3a56d984d5da75109ae63dc359cdce115e12407..12c28452f3eccabf85c30ab4cda97cd147a8f560 100644
--- a/chrome/common/print_messages.h
+++ b/chrome/common/print_messages.h
@@ -12,6 +12,7 @@
 #include "base/shared_memory.h"
 #include "ipc/ipc_message_macros.h"
 #include "printing/page_size_margins.h"
+#include "printing/print_job_constants.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/rect.h"
 
@@ -60,6 +61,8 @@ struct PrintMsg_PrintPages_Params {
 
 #define IPC_MESSAGE_START PrintMsgStart
 
+IPC_ENUM_TRAITS(printing::MarginType)
+
 // Parameters for a render request.
 IPC_STRUCT_TRAITS_BEGIN(PrintMsg_Print_Params)
   // Physical size of the page, including non-printable margins,
@@ -239,7 +242,7 @@ IPC_STRUCT_BEGIN(PrintHostMsg_ScriptedPrint_Params)
   IPC_STRUCT_MEMBER(int, cookie)
   IPC_STRUCT_MEMBER(int, expected_pages_count)
   IPC_STRUCT_MEMBER(bool, has_selection)
-  IPC_STRUCT_MEMBER(bool, use_overlays)
+  IPC_STRUCT_MEMBER(printing::MarginType, margin_type)
 IPC_STRUCT_END()