[cast_certificate] Enable jumbo build in components/cast_certificate

Using "use_jumbo_build=true" args in GN, speed up builds in
components/cast_certificate.

Bug: None
Change-Id: I4e8a48722dcdef687e57afd462b8394c668d5292
Reviewed-on: https://chromium-review.googlesource.com/1193626Reviewed-by: Doug Steedman <dougsteed@chromium.org>
Commit-Queue: Byoungkwon Ko <codeimpl@gmail.com>
Cr-Commit-Position: refs/heads/master@{#588266}

components/cast_certificate/BUILD.gn

@@ -2,7 +2,9 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-static_library("cast_certificate") {
+import("//build/config/jumbo.gni")
+
+jumbo_static_library("cast_certificate") {
   sources = [
     "cast_cert_validator.cc",
     "cast_cert_validator.h",
@@ -18,7 +20,7 @@ static_library("cast_certificate") {
   ]
 }
 
-static_library("test_support") {
+jumbo_static_library("test_support") {
   testonly = true
   sources = [
     "cast_cert_validator_test_helpers.cc",
@@ -33,7 +35,7 @@ static_library("test_support") {
   ]
 }
 
-source_set("unit_tests") {
+jumbo_source_set("unit_tests") {
   testonly = true
   sources = [
     "cast_cert_validator_unittest.cc",