Bug 1265798 - Implement CSS database to query css properties r=pbro

MozReview-Commit-ID: CAUh2GyeA2o

devtools/shared/specs/css-properties.js

@@ -0,0 +1,19 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+"use strict";
+
+const { RetVal, generateActorSpec } = require("devtools/shared/protocol");
+
+const cssPropertiesSpec = generateActorSpec({
+  typeName: "cssProperties",
+
+  methods: {
+    getCSSDatabase: {
+      request: {},
+      response: RetVal("json"),
+    }
+  }
+});
+
+exports.cssPropertiesSpec = cssPropertiesSpec;