Support print preset options for pdf document

public/web/WebPrintPresetOptions.h

+// Copyright 2014 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 WebPrintPresetOptions_h
+#define WebPrintPresetOptions_h
+
+#include <vector>
+
+namespace blink {
+
+struct WebPageRange;
+typedef std::vector<WebPageRange> WebPageRanges;
+
+enum WebDuplexMode {
+    WebUnknownDuplexMode = -1,
+    WebSimplex,
+    WebLongEdge,
+    WebShortEdge
+};
+

[Vitaly Buka (NO REVIEWS), 2014/10/10 00:51:01]

Should we put WebPageRange, WebPageRanges and WebDuplexMode inside
WebPrintPresetOptions, removing "Web" prefix?

[Nikhil, 2014/10/20 10:04:23]

We can do that. I don't have strong preference here. But, for PPAPI, similar
structs are outside of the main struct. Please see :

PP_PdfPrintPresetOptions_Dev :
https://codereview.chromium.org/375253002/diff/260001/ppapi/c/private/ppp_pdf.h

PP_PrintDuplexMode_Dev and PP_PrintRange_Dev :
https://codereview.chromium.org/375253002/diff/260001/ppapi/c/dev/pp_print_se...

Please let me know WDYT.

+struct WebPageRange {
+    int from;
+    int to;
+};
+
+struct WebPrintPresetOptions {
+    WebPrintPresetOptions()
+        : isScalingDisabled(false)
+        , copies(0)
+        , duplexMode(WebUnknownDuplexMode) { }
+
+    // Specifies whether scaling is disabled.
+    bool isScalingDisabled;
+
+    // Specifies the number of copies to be printed.
+    int copies;
+
+    // Specifies duplex mode to be used for printing.
+    WebDuplexMode duplexMode;
+
+    // Specifies page range to be used for printing.
+    WebPageRanges pageRanges;
+};
+
+} // namespace blink
+
+#endif