add customized printing setting for headless

components/printing/renderer/print_web_view_helper.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 COMPONENTS_PRINTING_RENDERER_PRINT_WEB_VIEW_HELPER_H_
 #define COMPONENTS_PRINTING_RENDERER_PRINT_WEB_VIEW_HELPER_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 275 matching lines @@
   void FinishFramePrinting();
   // Render the frame for printing.
   bool RenderPagesForPrint(blink::WebLocalFrame* frame,
                            const blink::WebNode& node);
 #endif  // BUILDFLAG(ENABLE_BASIC_PRINTING)
 
   // Prints the page listed in |params|.
 #if defined(OS_MACOSX)
   void PrintPagesInternal(const PrintMsg_Print_Params& params,
                           const std::vector<int>& printed_pages,
+                          int page_count,
                           blink::WebLocalFrame* frame);
 #else
   void PrintPageInternal(const PrintMsg_Print_Params& params,
                          int page_number,
+                         int page_count,
                          blink::WebLocalFrame* frame,
                          PdfMetafileSkia* metafile,
                          gfx::Size* page_size_in_dpi,
                          gfx::Rect* content_area_in_dpi,
                          gfx::Rect* printable_area_in_dpi);
 #endif  // defined(OS_MACOSX)
 
   // Platform specific helper function for rendering page(s) to |metafile|.
 #if defined(OS_MACOSX)
   void RenderPage(const PrintMsg_Print_Params& params,
                   int page_number,
+                  int page_count,
                   blink::WebLocalFrame* frame,
                   bool is_preview,
                   PdfMetafileSkia* metafile,
                   gfx::Size* page_size,
                   gfx::Rect* content_rect);
 #endif  // defined(OS_MACOSX)
 
   // Renders page contents from |frame| to |content_area| of |canvas|.
   // |page_number| is zero-based.
   // When method is called, canvas should be setup to draw to |canvas_area|
@@ skipping 18 matching lines @@
       bool ignore_css_margins,
       double* scale_factor,
       PageSizeMargins* page_layout_in_points);
 
   // Return an array of pages to print given the print |params| and an expected
   // |page_count|. Page numbers are zero-based.
   static std::vector<int> GetPrintedPages(
       const PrintMsg_PrintPages_Params& params,
       int page_count);
 
-#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
   // Given the |device| and |canvas| to draw on, prints the appropriate headers

[Lei Zhang, 2017/05/04 07:29:36]

Uh, I noticed this is wrong. Would you mind correcting it since we are already
touching this file?

// Given the |canvas| to draw on, prints the appropriate headers and footers
// to |canvas| using information from the remaining parameters.

[jzfeng, 2017/05/05 02:41:33]

Done.

   // and footers using strings from |header_footer_info| on to the canvas.
   static void PrintHeaderAndFooter(blink::WebCanvas* canvas,
                                    int page_number,
                                    int total_pages,
                                    const blink::WebFrame& source_frame,
                                    float webkit_scale_factor,
                                    const PageSizeMargins& page_layout_in_points,
                                    const PrintMsg_Print_Params& params);
-#endif  // BUILDFLAG(ENABLE_PRINT_PREVIEW)
 
   // Script Initiated Printing ------------------------------------------------
 
   // Return true if script initiated printing is currently
   // allowed. |user_initiated| should be true when a user event triggered the
   // script, most likely by pressing a print button on the page.
   bool IsScriptInitiatedPrintAllowed(blink::WebLocalFrame* frame,
                                      bool user_initiated);
 
 #if BUILDFLAG(ENABLE_PRINT_PREVIEW)
@@ skipping 187 matching lines @@
   base::Closure on_stop_loading_closure_;
 
   base::WeakPtrFactory<PrintWebViewHelper> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintWebViewHelper);
 };
 
 }  // namespace printing
 
 #endif  // COMPONENTS_PRINTING_RENDERER_PRINT_WEB_VIEW_HELPER_H_