Add PDF compositor service

chrome/browser/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/chrome_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//chrome/common/features.gni")
@@ skipping 1508 matching lines @@
     "//components/password_manager/sync/browser",
     "//components/payments/mojom",
     "//components/payments/mojom:mojom_payment_app",
     "//components/physical_web/eddystone",
     "//components/policy:generated",
     "//components/policy/core/browser",
     "//components/policy/proto",
     "//components/precache/core",
     "//components/prefs:prefs",
     "//components/previews/core",
+    "//components/printing/service/public/interfaces",

[Lei Zhang, 2017/04/22 00:12:26]

Should this be down in the "if (enable_basic_printing || enable_print_preview)"
block?

[Wei Li, 2017/04/27 05:34:16]

Done.

     "//components/profile_metrics",
     "//components/proxy_config",
     "//components/query_parser",
     "//components/rappor",
     "//components/rappor:rappor_recorder",
     "//components/renderer_context_menu",
     "//components/resources",
     "//components/safe_browsing_db",
     "//components/safe_json",
     "//components/search",
@@ skipping 3153 matching lines @@
       "media/pepper_cdm_test_constants.cc",
       "media/pepper_cdm_test_constants.h",
     ]
   }
 }
 
 service_manifest("preferences_forwarder_manifest") {
   name = "preferences_forwarder"
   source = "prefs/forwarder_manifest.json"
 }