Added Header and Footer support using Skia

printing/print_job_constants.h

 // Copyright (c) 2011 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 PRINTING_PRINT_JOB_CONSTANTS_H_
 #define PRINTING_PRINT_JOB_CONSTANTS_H_
 
 namespace printing {
 
 extern const char kIsFirstRequest[];
 extern const char kPreviewRequestID[];
 extern const char kSettingCloudPrintId[];
 extern const char kSettingCollate[];
 extern const char kSettingColor[];
 extern const char kSettingCopies[];
 extern const char kSettingDeviceName[];
 extern const char kSettingDuplexMode[];
+extern const char kSettingHeaderFooterEnabled[];
+extern const char kSettingHeaderFooterFontFamilyName[];
+extern const char kSettingHeaderFooterFontName[];
+extern const int kSettingHeaderFooterFontSize;
+extern const float kSettingHeaderFooterHorizontalRegions;
+extern const float kSettingHeaderFooterInterstice;
+extern const char kSettingHeaderFooterDate[];
+extern const char kSettingHeaderFooterTitle[];
+extern const char kSettingHeaderFooterURL[];
 extern const char kSettingLandscape[];
 extern const char kSettingPageRange[];
 extern const char kSettingPageRangeFrom[];
 extern const char kSettingPageRangeTo[];
 extern const char kSettingPrinterName[];
 extern const char kSettingPrintToPDF[];
 
 extern const int FIRST_PAGE_INDEX;
 extern const int COMPLETE_PREVIEW_DOCUMENT_INDEX;
 extern const int INVALID_PAGE_INDEX;
 
 // Print job duplex mode values.
 enum DuplexMode {
   SIMPLEX,
   LONG_EDGE,
   SHORT_EDGE,
 };
 
+// Specifies the horizontal alignment of the headers and footers.
+enum HorizontalHeaderFooterPosition {
+  LEFT,
+  CENTER,
+  RIGHT
+};
+
+// Specifies the vertical alignment of the Headers and Footers.
+enum VerticalHeaderFooterPosition {
+  TOP,
+  BOTTOM
+};
+
 }  // namespace printing
 
 #endif  // PRINTING_PRINT_JOB_CONSTANTS_H_