Add PDF compositor service

printing/common/pdf_metafile_utils.cc

Index: printing/common/pdf_metafile_utils.cc
diff --git a/printing/common/pdf_metafile_utils.cc b/printing/common/pdf_metafile_utils.cc
new file mode 100644
index 0000000000000000000000000000000000000000..3a30ad0018d6c32e37a5a7a161c93d52c345cefd
--- /dev/null
+++ b/printing/common/pdf_metafile_utils.cc
@@ -0,0 +1,46 @@
+// Copyright 2017 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.
+
+#include "printing/common/pdf_metafile_utils.h"
+
+#include "base/time/time.h"
+#include "third_party/skia/include/core/SkTime.h"
+
+namespace {
+
+SkTime::DateTime TimeToSkTime(base::Time time) {
+  base::Time::Exploded exploded;
+  time.UTCExplode(&exploded);
+  SkTime::DateTime skdate;
+  skdate.fTimeZoneMinutes = 0;
+  skdate.fYear = exploded.year;
+  skdate.fMonth = exploded.month;
+  skdate.fDayOfWeek = exploded.day_of_week;
+  skdate.fDay = exploded.day_of_month;
+  skdate.fHour = exploded.hour;
+  skdate.fMinute = exploded.minute;
+  skdate.fSecond = exploded.second;
+  return skdate;
+}
+
+}  // namespace
+
+namespace printing {
+
+sk_sp<SkDocument> MakePdfDocument(const std::string& creator,
+                                  SkWStream* stream) {
+  SkDocument::PDFMetadata metadata;
+  SkTime::DateTime now = TimeToSkTime(base::Time::Now());
+  metadata.fCreation.fEnabled = true;
+  metadata.fCreation.fDateTime = now;
+  metadata.fModified.fEnabled = true;
+  metadata.fModified.fDateTime = now;
+  metadata.fCreator = creator.empty()
+                          ? SkString("Chromium")
+                          : SkString(creator.c_str(), creator.size());
+  return SkDocument::MakePDF(stream, SK_ScalarDefaultRasterDPI, metadata,
+                             nullptr, false);
+}
+
+}  // namespace printing