Move Cast certificate verification code from extensions to components.

components/cast_certificate.gypi

 # Copyright 2016 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.
 
 {
   'targets': [
     {
-      # GN version: //components/client_update_protocol
-      'target_name': 'client_update_protocol',
+      'target_name': 'cast_certificate',
       'type': 'static_library',
-      'dependencies': [
-        '../base/base.gyp:base',
-        '../crypto/crypto.gyp:crypto',
-      ],
-
       'include_dirs': [
         '..',
       ],
+      'dependencies': [
+        '../base/base.gyp:base',
+        '../net/net.gyp:net',
+      ],
       'sources': [
-        'client_update_protocol/ecdsa.h',
-        'client_update_protocol/ecdsa.cc',
+        'cast_certificate/cast_cert_validator.cc',
+        'cast_certificate/cast_cert_validator.h',
+        'cast_certificate/cast_root_ca_cert_der-inc.h',
+        'cast_certificate/eureka_root_ca_der-inc.h',
       ],
     },
     {
-      # GN version: //components/client_update_protocol:test_support
-      'target_name': 'client_update_protocol_test_support',
+      'target_name': 'cast_certificate_test_support',
       'type': 'static_library',
-      'dependencies': [
-        'update_client',
-        '../testing/gtest.gyp:gtest',
-      ],
-
       'include_dirs': [
         '..',
       ],
+      'dependencies': [
+        '../base/base.gyp:base',
+        '../net/net.gyp:net',
+        '../testing/gtest.gyp:gtest',
+        'cast_certificate',
+      ],
       'sources': [
-        'client_update_protocol/ecdsa_unittest.cc',
+        'cast_certificate/cast_cert_validator_test_helpers.cc',
+        'cast_certificate/cast_cert_validator_test_helpers.h',
       ],
     },
   ],
 }