Add PDF compositor service

printing/common/pdf_metafile_utils.h

Index: printing/common/pdf_metafile_utils.h
diff --git a/printing/common/pdf_metafile_utils.h b/printing/common/pdf_metafile_utils.h
new file mode 100644
index 0000000000000000000000000000000000000000..b063c82adf225afbdf3c554fd3fa6106977cb030
--- /dev/null
+++ b/printing/common/pdf_metafile_utils.h
@@ -0,0 +1,28 @@
+// Copyright (c) 2017 The Chromium Authors. All rights reserved.

[Lei Zhang, 2017/04/27 22:42:22]

No (c)

[Wei Li, 2017/04/29 04:35:18]

Done.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PRINTING_COMMON_PDF_METAFILE_UTILS_H_
+#define PRINTING_COMMON_PDF_METAFILE_UTILS_H_
+
+#include <string>
+
+#include "skia/ext/platform_canvas.h"
+#include "third_party/skia/include/core/SkDocument.h"
+#include "third_party/skia/include/core/SkRefCnt.h"
+#include "third_party/skia/include/core/SkStream.h"
+
+namespace printing {
+
+enum SkiaDocumentType {
+  PDF_SKIA_DOCUMENT_TYPE,
+  // MSKP is an experimental, fragile, and diagnostic-only document type.
+  MSKP_SKIA_DOCUMENT_TYPE,
+};
+
+sk_sp<SkDocument> MakePdfDocument(const std::string& creator,
+                                  SkWStream* stream);
+
+}  // namespace printing
+
+#endif  // PRINTING_COMMON_PDF_METAFILE_UTILS_H_