Revert of More System Dialog printing code disabled on Windows.

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 b943301c8c258e27bb4894b1138993dcaaae041d..a51c1ccb11ad0de075f2e746adf4ecc5b87cbe2e 100644
--- a/chrome/common/print_messages.h
+++ b/chrome/common/print_messages.h
@@ -318,15 +318,10 @@ IPC_MESSAGE_ROUTED0(PrintMsg_PrintNodeUnderContextMenu)
 IPC_MESSAGE_ROUTED1(PrintMsg_PrintForPrintPreview,
                     base::DictionaryValue /* settings */)
 
-#if !defined(OS_WIN)
 // Tells the render view to switch the CSS to print media type, renders every
 // requested pages and switch back the CSS to display media type.
 IPC_MESSAGE_ROUTED0(PrintMsg_PrintPages)
 
-// Like PrintMsg_PrintPages, but using the print preview document's frame/node.
-IPC_MESSAGE_ROUTED0(PrintMsg_PrintForSystemDialog)
-#endif  // !OS_WIN
-
 // Tells the render view that printing is done so it can clean up.
 IPC_MESSAGE_ROUTED1(PrintMsg_PrintingDone,
                     bool /* success */)
@@ -341,6 +336,9 @@ IPC_MESSAGE_ROUTED1(PrintMsg_SetScriptedPrintingBlocked,
 IPC_MESSAGE_ROUTED1(PrintMsg_PrintPreview,
                     base::DictionaryValue /* settings */)
 
+// Like PrintMsg_PrintPages, but using the print preview document's frame/node.
+IPC_MESSAGE_ROUTED0(PrintMsg_PrintForSystemDialog)
+
 // Messages sent from the renderer to the browser.
 
 #if defined(OS_WIN)