Full runtime cloud policy proto will not be generated by default..

components/policy/BUILD.gn

Index: components/policy/BUILD.gn
diff --git a/components/policy/BUILD.gn b/components/policy/BUILD.gn
index e6aea95c79616abde1925c88193b90980fed02ee..e4c423ac4e23faa03f36983c57d230180bd1ceff 100644
--- a/components/policy/BUILD.gn
+++ b/components/policy/BUILD.gn
@@ -84,7 +84,6 @@ action("cloud_policy_code_generate") {
     protobuf_decoder_path,
     chrome_settings_proto_path,
     cloud_policy_proto_path,
-    cloud_policy_full_runtime_proto_path,
     app_restrictions_path,
     risk_tag_header_path,
   ]
@@ -102,8 +101,6 @@ action("cloud_policy_code_generate") {
         rebase_path(chrome_settings_proto_path, root_build_dir),
     "--cloud-policy-protobuf=" +
         rebase_path(cloud_policy_proto_path, root_build_dir),
-    "--cloud-policy-full-runtime-protobuf=" +
-        rebase_path(cloud_policy_full_runtime_proto_path, root_build_dir),
     "--cloud-policy-decoder=" +
         rebase_path(protobuf_decoder_path, root_build_dir),
     "--app-restrictions-definition=" +
@@ -116,6 +113,35 @@ action("cloud_policy_code_generate") {
   ]
 }
 
+action("cloud_policy_full_runtime_code_generate") {
+  script = "tools/generate_policy_source.py"
+  chrome_version_abspath = "//chrome/VERSION"
+  chrome_version_path = rebase_path(chrome_version_abspath, root_build_dir)
+
+  if (is_chromeos) {
+    chromeos_flag = "1"
+  } else {
+    chromeos_flag = "0"
+  }
+
+  inputs = [
+    chrome_version_abspath,
+    "resources/policy_templates.json",
+  ]
+  outputs = [
+    cloud_policy_full_runtime_proto_path,
+  ]
+
+  args = [
+    "--cloud-policy-full-runtime-protobuf=" +
+        rebase_path(cloud_policy_full_runtime_proto_path, root_build_dir),
+    chrome_version_path,
+    target_os,
+    chromeos_flag,
+    rebase_path("resources/policy_templates.json", root_build_dir),
+  ]
+}
+
 policy_templates_grd_file = "resources/policy_templates.grd"
 
 grit("grit_policy_templates") {