Add the copresence component.

components/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.
 
 # Collection of all components. You wouldn't link to this, but this is rather
 # to reference the files so they can be compiled by the build system.
 group("all_components") {
   visibility = "//:*"  # Only for the root targets to bring in.
 
   deps = [
@@ skipping 141 matching lines @@
       "//components/user_prefs",  # Blocked on content.
       "//components/visitedlink/browser",  # Blocked on content.
       "//components/visitedlink/common",  # Blocked on content.
       "//components/visitedlink/renderer",  # Blocked on blink
       "//components/web_modal",  # Blocked on content.
     ]
   }
 
   if (!is_ios && !is_android) {
     deps += [
+      "//components/copresence",
       "//components/storage_monitor",
     ]
   }
 }
 
 # TODO(GYP) enable when it links.
 if (false) {
 
 # To add a unit test to this target, make a "unit_test" source_set in your
 # component (it's important to use a source_set instead of a static library or
@@ skipping 23 matching lines @@
   ]
 
   # TODO(GYP) need this target.
   #'breakpad/app/crash_keys_win_unittest.cc',
 
   # Precache tests need these defines.
   #configs += [ "//components/precache/core:precache_config" ]
 }
 
 }