Add PDF compositor service

chrome/utility/BUILD.gn

 # 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.
 
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/sysroot.gni")
 import("//extensions/features/features.gni")
 import("//printing/features/features.gni")
 
@@ skipping 157 matching lines @@
 
   if (enable_print_preview || (enable_basic_printing && is_win)) {
     deps += [ "//pdf" ]
   } else {
     sources -= [
       "printing_handler.cc",
       "printing_handler.h",
     ]
   }
 
+  if (enable_basic_printing || enable_print_preview) {

[Lei Zhang, 2017/04/27 22:42:21]

Just enable_printing then?

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

We only have enable_printing as buildflag, but not gn args. We can add it if
this becomes too cumbersome. 

+    deps += [
+      "//components/printing/service/public/cpp:factory",
+      "//components/printing/service/public/interfaces",
+    ]
+  }
+
   if (is_mac && safe_browsing_mode == 1) {
     deps += [ "//chrome/utility/safe_browsing/mac" ]
   }
 
   if (!is_android) {
     sources += [
       "media_router/dial_device_description_parser_impl.cc",
       "media_router/dial_device_description_parser_impl.h",
     ]
   }
 }