Add cloud_print to the GN build.

content/public/common/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/features.gni")
 import("//content/common/common.gni")
 import("//third_party/mojo/src/mojo/public/tools/bindings/mojom.gni")
 
 # See //content/BUILD.gn for how this works.
 group("common") {
   if (is_component_build) {
     public_deps = [
       "//content",
     ]
   } else {
     public_deps = [
       ":common_sources",
     ]
   }
 }
 
 # This target allows other targets to depend on result_codes.h which is a
 # header-only dependency, without bringing in all of content.
 source_set("result_codes") {
   sources = [
     "result_codes.h",
   ]
 }
 
+# Forces static linking for targets using the static_switches constants, even
+# in the component build. This config makes it impossible to use the static
+# switches target and use the rest of content at the same time, because the
+# component export flags won't be consistent.
+config("static_switches_defines") {
+  defines = [ "COMPILE_CONTENT_STATICALLY" ]
+}
+
+# This target allows you to use the content_switches constants and statically
+# link to it, without depending on the rest of content. This is only for use
+# without content, or you will get multiply defined symbols.
+source_set("static_switches") {
+  public = [
+    "content_switches.h",
+  ]
+  sources = [
+    "//content/common/content_export.h",
+    "content_switches.cc",
+  ]
+
+  public_configs = [ ":static_switches_defines" ]
+}
+
 source_set("common_sources") {
   visibility = [ "//content/*" ]
 
   sources = rebase_path(content_common_gypi_values.public_common_sources,
                         ".",
                         "//content")
 
   configs += [
     "//build/config:precompiled_headers",
     "//content:content_implementation",
@@ skipping 21 matching lines @@
 }
 
 mojom("mojo_bindings") {
   sources = [
     "background_sync.mojom",
     "mojo_geoposition.mojom",
     "permission_status.mojom",
     "service_worker_event_status.mojom",
   ]
 }