PrintPreview: Hide/Show the header footer option based on print frame margins.

chrome/common/print_messages.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // IPC messages for printing.
 // Multiply-included message file, hence no include guard.
 
 #include <string>
 #include <vector>
 
@@ skipping 349 matching lines @@
                     bool /* webnode_only */)
 
 // Notify the browser the number of pages in the print preview document.
 IPC_MESSAGE_ROUTED1(PrintHostMsg_DidGetPreviewPageCount,
                     PrintHostMsg_DidGetPreviewPageCount_Params /* params */)
 
 // Notify the browser of the default page layout according to the currently
 // selected printer and page size.
 // |has_custom_page_size_style| is true when the printing frame has a custom
 // page size css otherwise false.
-IPC_MESSAGE_ROUTED2(PrintHostMsg_DidGetDefaultPageLayout,
+// |header_footer_applies| is true when the printing frame has sufficient
+// margin values to add header or footer.
+IPC_MESSAGE_ROUTED3(PrintHostMsg_DidGetDefaultPageLayout,
                     printing::PageSizeMargins /* page layout in points */,
-                    bool /* has custom page size style */)
+                    bool /* has custom page size style */,
+                    bool /* header footer applies */)
 
 // Notify the browser a print preview page has been rendered.
 IPC_MESSAGE_ROUTED1(PrintHostMsg_DidPreviewPage,
                     PrintHostMsg_DidPreviewPage_Params /* params */)
 
 // Asks the browser whether the print preview has been cancelled.
 IPC_SYNC_MESSAGE_ROUTED2_1(PrintHostMsg_CheckForCancel,
                            std::string /* print preview ui address */,
                            int /* request id */,
                            bool /* print preview cancelled */)
@@ skipping 19 matching lines @@
 // Tell the browser print preview found the selected printer has invalid
 // settings (which typically caused by disconnected network printer or printer
 // driver is bogus).
 IPC_MESSAGE_ROUTED1(PrintHostMsg_PrintPreviewInvalidPrinterSettings,
                     int /* document cookie */)
 
 // Run a nested message loop in the renderer until print preview for
 // window.print() finishes.
 IPC_SYNC_MESSAGE_ROUTED1_0(PrintHostMsg_ScriptedPrintPreview,
                            bool /* is_modifiable */)