Add PDF compositor service

components/printing/service/public/cpp/pdf_compositor_service_factory.cc

Index: components/printing/service/public/cpp/pdf_compositor_service_factory.cc
diff --git a/components/printing/service/public/cpp/pdf_compositor_service_factory.cc b/components/printing/service/public/cpp/pdf_compositor_service_factory.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f832f86031338bdf62fbafbde5742688c2f867c9
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+++ b/components/printing/service/public/cpp/pdf_compositor_service_factory.cc
@@ -0,0 +1,23 @@
+// 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 "components/printing/service/public/cpp/pdf_compositor_service_factory.h"
+
+#include "components/printing/service/pdf_compositor_service.h"
+#include "content/public/utility/utility_thread.h"
+#include "third_party/WebKit/public/platform/WebImageGenerator.h"
+#include "third_party/skia/include/core/SkGraphics.h"
+
+namespace printing {
+
+std::unique_ptr<service_manager::Service> CreatePdfCompositorService(
+    const std::string& creator) {
+  content::UtilityThread::Get()->EnsureBlinkInitialized();
+  // Hook up blink's codecs so skia can call them.
+  SkGraphics::SetImageGeneratorFromEncodedDataFactory(
+      blink::WebImageGenerator::Create);
+  return printing::PdfCompositorService::Create(creator);
+}
+
+}  // namespace printing