Add PDF compositor service

components/printing/service/public/cpp/BUILD.gn

Index: components/printing/service/public/cpp/BUILD.gn
diff --git a/components/printing/service/public/cpp/BUILD.gn b/components/printing/service/public/cpp/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..f0c9b84f773352053cea2544340dd3e15643720c
--- /dev/null
+++ b/components/printing/service/public/cpp/BUILD.gn
@@ -0,0 +1,35 @@
+# 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.
+
+import("//mojo/public/tools/bindings/mojom.gni")
+
+source_set("client") {
+  sources = [
+    "pdf_compositor_client.cc",
+    "pdf_compositor_client.h",
+  ]
+
+  public_deps = [
+    "//components/printing/service/public/interfaces",
+    "//services/service_manager/public/cpp",
+  ]
+}
+
+source_set("factory") {
+  sources = [
+    "pdf_compositor_service_factory.cc",
+    "pdf_compositor_service_factory.h",
+  ]
+
+  deps = [
+    "//components/printing/service/",
+    "//content/public/common",
+    "//content/public/utility",
+  ]
+
+  public_deps = [
+    "//components/printing/service/public/interfaces",
+    "//services/service_manager/public/cpp",
+  ]
+}