Deprecate DLOPEN_GNOME_KEYRING flag

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 43 matching lines @@
       "/DELAYLOAD:pdh.dll",  # The task manager is rarely used.
     ]
   }
 }
 
 if (is_desktop_linux) {
   # Gnome-keyring is normally dynamically loaded. The gnome_keyring config
   # will set this up.
   pkg_config("gnome_keyring") {
     packages = [ "gnome-keyring-1" ]
-    defines = [
-      "USE_GNOME_KEYRING",
-      "DLOPEN_GNOME_KEYRING",
-    ]
+    defines = [ "USE_GNOME_KEYRING" ]
     ignore_libs = true
   }
 
   # If you want to link gnome-keyring directly (use only for unit tests)
   # ADDITIONALLY add this config on top of ":gnome_keyring". pkg-config is a
   # bit slow, so prefer not to run it again. In practice, gnome-keyring's libs
   # are just itself and common gnome ones we link already, so we can get away
   # with additionally just coding the library name here.
   config("gnome_keyring_direct") {
     libs = [ "gnome-keyring" ]
@@ skipping 1306 matching lines @@
   # linking all of the test support.
   static_library("pepper_cdm_test_constants") {
     testonly = true
     visibility = [ "//chrome/*" ]
     sources = [
       "media/pepper_cdm_test_constants.cc",
       "media/pepper_cdm_test_constants.h",
     ]
   }
 }