Move GnomeKeyringLoader to components/os_crypt

components/os_crypt/BUILD.gn

Index: components/os_crypt/BUILD.gn
diff --git a/components/os_crypt/BUILD.gn b/components/os_crypt/BUILD.gn
index 7ae69302e4737ea7399e7e3bffed6d4b92ca3994..2c40d08413eb51be681300ccdc49a912c22cc7e1 100644
--- a/components/os_crypt/BUILD.gn
+++ b/components/os_crypt/BUILD.gn
@@ -4,6 +4,29 @@
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
+import("//build/config/linux/pkg_config.gni")
+
+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" ]
+    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.
+  # TODO(cfroussios): This is only used by
+  # chrome/browser/password_manager/native_backend_gnome_x_unittest.cc
+  # We should deprecate both.
+  config("gnome_keyring_direct") {
+    libs = [ "gnome-keyring" ]
+  }
+}
 
 static_library("os_crypt") {
   sources = [
@@ -57,10 +80,15 @@ static_library("os_crypt") {
       sources += [
         "key_storage_libsecret.cc",
         "key_storage_libsecret.h",
+        "keyring_util_linux.cc",
+        "keyring_util_linux.h",
         "libsecret_util_linux.cc",
         "libsecret_util_linux.h",
       ]
-      configs += [ "//build/config/linux:glib" ]
+      configs += [
+        "//build/config/linux:glib",
+        ":gnome_keyring",
+      ]
       deps += [ "//third_party/libsecret" ]
       defines += [ "USE_LIBSECRET" ]
     }