[Chrome] Support NumCopies print preset

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 709be0eb4f035549025292d9dea9110c47e0db30..ff219b1d55e937c3d1893ef03078110bac463ec5 100644
--- a/chrome/common/print_messages.h
+++ b/chrome/common/print_messages.h
@@ -446,3 +446,7 @@ IPC_MESSAGE_ROUTED1(PrintHostMsg_ShowScriptedPrintPreview,
 // Notify the browser that the PDF in the initiator renderer has disabled print
 // scaling option.
 IPC_MESSAGE_ROUTED0(PrintHostMsg_PrintPreviewScalingDisabled)

[Vitaly Buka (NO REVIEWS), 2014/07/10 01:13:05]

Let's create structure with all options we'd like to get from PDF, including
PrintPreviewScalingDisabled and send it as single message
struct PrintHostMsg_SetOptionsFromDocument {
}

[Nikhil, 2014/07/10 14:46:53]

Shall I create another CL for this first? To introduce new structure and making
relevant changes for PrintScaling option. Or you'd prefer to have it as part of
this CL?

+
+// Notify the browser regarding number of copies to be printed.
+IPC_MESSAGE_ROUTED1(PrintHostMsg_PrintPreviewNumCopies,
+                    int /* number of copies */)