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diff --git a/printing/page_overlays.h b/printing/page_overlays.h
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+// Copyright (c) 2006-2009 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_PAGE_OVERLAYS_H_
+#define PRINTING_PAGE_OVERLAYS_H_
+
+#include <string>
+
+namespace printing {
+
+class PrintedDocument;
+class PrintedPage;
+
+// Page's overlays, i.e. headers and footers. Contains the strings that will be
+// printed in the overlays, with actual values as variables. The variables are
+// replaced by their actual values with ReplaceVariables().
+class PageOverlays {
+ public:
+  // Position of the header/footer.
+  enum HorizontalPosition {
+    LEFT,
+    CENTER,
+    RIGHT,
+  };
+
+  // Position of the header/footer.
+  enum VerticalPosition {
+    TOP,
+    BOTTOM,
+  };
+
+  PageOverlays();
+
+  // Equality operator.
+  bool Equals(const PageOverlays& rhs) const;
+
+  // Returns the string of an overlay according to its x,y position.
+  const std::wstring& GetOverlay(HorizontalPosition x,
+                                 VerticalPosition y) const;
+
+  // Sets the string of an overlay according to its x,y position.
+  void SetOverlay(HorizontalPosition x, VerticalPosition y,
+                  std::wstring& input);
+
+  // Replaces the variables in |input| with their actual values according to the
+  // properties of the current printed document and the current printed page.
+  static std::wstring ReplaceVariables(const std::wstring& input,
+                                       const PrintedDocument& document,
+                                       const PrintedPage& page);
+
+  // Keys that are dynamically replaced in the header and footer by their actual
+  // values.
+  // Web page's title.
+  static const wchar_t* const kTitle;
+  // Print job's start time.
+  static const wchar_t* const kTime;
+  // Print job's start date.
+  static const wchar_t* const kDate;
+  // Printed page's number.
+  static const wchar_t* const kPage;
+  // Print job's total page count.
+  static const wchar_t* const kPageCount;
+  // Printed page's number on total page count.
+  static const wchar_t* const kPageOnTotal;
+  // Web page's displayed url.
+  static const wchar_t* const kUrl;
+
+  // Actual headers and footers.
+  std::wstring top_left;
+  std::wstring top_center;
+  std::wstring top_right;
+  std::wstring bottom_left;
+  std::wstring bottom_center;
+  std::wstring bottom_right;
+};
+
+}  // namespace printing
+
+#endif  // PRINTING_PAGE_OVERLAYS_H_