add customized printing setting for headless

content/browser/devtools/protocol/page_handler.h

Index: content/browser/devtools/protocol/page_handler.h
diff --git a/content/browser/devtools/protocol/page_handler.h b/content/browser/devtools/protocol/page_handler.h
index faace0adfaf25306aba30490bb643e2128e4f982..62d5ebbf23d258a488ebd7875cb6841a2042a165 100644
--- a/content/browser/devtools/protocol/page_handler.h
+++ b/content/browser/devtools/protocol/page_handler.h
@@ -77,7 +77,19 @@ class PageHandler : public DevToolsDomainHandler,
       Maybe<int> quality,
       Maybe<bool> from_surface,
       std::unique_ptr<CaptureScreenshotCallback> callback) override;
-  void PrintToPDF(std::unique_ptr<PrintToPDFCallback> callback) override;
+  void PrintToPDF(Maybe<int> dpi,
+                  Maybe<bool> landscape,
+                  Maybe<bool> display_header_footer,
+                  Maybe<bool> print_backgrounds,
+                  Maybe<double> scale,
+                  Maybe<String> paper_type,
+                  Maybe<String> margin_type,
+                  Maybe<double> margin_top,
+                  Maybe<double> margin_bottom,
+                  Maybe<double> margin_left,
+                  Maybe<double> margin_right,
+                  Maybe<String> page_ranges,
+                  std::unique_ptr<PrintToPDFCallback> callback) override;
   Response StartScreencast(Maybe<std::string> format,
                            Maybe<int> quality,
                            Maybe<int> max_width,