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

chrome/browser/printing/print_preview_message_handler.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.
 
 #ifndef CHROME_BROWSER_PRINTING_PRINT_PREVIEW_MESSAGE_HANDLER_H_
 #define CHROME_BROWSER_PRINTING_PRINT_PREVIEW_MESSAGE_HANDLER_H_
 #pragma once
 
 #include "base/compiler_specific.h"
 #include "content/public/browser/web_contents_observer.h"
 
 class PrintPreviewUI;
 class TabContentsWrapper;
 struct PrintHostMsg_DidGetPreviewPageCount_Params;
 struct PrintHostMsg_DidPreviewDocument_Params;
 struct PrintHostMsg_DidPreviewPage_Params;
 
+namespace gfx {
+class Rect;
+}
+
 namespace printing {
 
 struct PageSizeMargins;
 
 // TabContents offloads print preview message handling to
 // PrintPreviewMessageHandler. This object has the same life time as the
 // TabContents that owns it.
 class PrintPreviewMessageHandler : public content::WebContentsObserver {
  public:
   explicit PrintPreviewMessageHandler(content::WebContents* web_contents);
@@ skipping 11 matching lines @@
   // Helper function to return the TabContentsWrapper for web_contents().
   TabContentsWrapper* tab_contents_wrapper();
 
   // Gets the PrintPreviewUI associated with the WebContents being observed.
   PrintPreviewUI* GetPrintPreviewUI();
 
   // Message handlers.
   void OnRequestPrintPreview(bool source_is_modifiable, bool webnode_only);
   void OnDidGetDefaultPageLayout(
       const printing::PageSizeMargins& page_layout_in_points,
+      const gfx::Rect& printable_area_in_points,
       bool has_custom_page_size_style);
   void OnDidGetPreviewPageCount(
       const PrintHostMsg_DidGetPreviewPageCount_Params& params);
   void OnDidPreviewPage(const PrintHostMsg_DidPreviewPage_Params& params);
   void OnMetafileReadyForPrinting(
       const PrintHostMsg_DidPreviewDocument_Params& params);
   void OnPrintPreviewFailed(int document_cookie);
   void OnPrintPreviewCancelled(int document_cookie);
   void OnInvalidPrinterSettings(int document_cookie);
 
   DISALLOW_COPY_AND_ASSIGN(PrintPreviewMessageHandler);
 };
 
 }  // namespace printing
 
 #endif  // CHROME_BROWSER_PRINTING_PRINT_PREVIEW_MESSAGE_HANDLER_H_