Revert of Refactoring of Cast-related crypto code

extensions/common/BUILD.gn

Index: extensions/common/BUILD.gn
diff --git a/extensions/common/BUILD.gn b/extensions/common/BUILD.gn
index 1ea2757529b254e929dfdb2ec18f8b096f468361..6fa6f8b575ac262355b628ed2b647909d8f3d198 100644
--- a/extensions/common/BUILD.gn
+++ b/extensions/common/BUILD.gn
@@ -2,7 +2,6 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 
@@ -42,8 +41,6 @@
       "api/sockets/sockets_manifest_handler.h",
       "api/sockets/sockets_manifest_permission.cc",
       "api/sockets/sockets_manifest_permission.h",
-      "cast/cast_cert_validator.cc",
-      "cast/cast_cert_validator.h",
       "common_manifest_handlers.cc",
       "common_manifest_handlers.h",
       "csp_validator.cc",
@@ -252,12 +249,6 @@
       "//url",
     ]
 
-    if (use_openssl) {
-      sources += [ "cast/cast_cert_validator_openssl.cc" ]
-    } else {
-      sources += [ "cast/cast_cert_validator_nss.cc" ]
-    }
-
     if (enable_nacl) {
       sources += [
         "manifest_handlers/nacl_modules_handler.cc",