Create a mechanism define declarative rules via the extension manifest.

extensions/test/data/manifest_tests/event_rules_invalid.json

Index: extensions/test/data/manifest_tests/event_rules_invalid.json
diff --git a/extensions/test/data/manifest_tests/event_rules_invalid.json b/extensions/test/data/manifest_tests/event_rules_invalid.json
new file mode 100644
index 0000000000000000000000000000000000000000..25f639709103752c4765b8399422e7f80cc65422
--- /dev/null
+++ b/extensions/test/data/manifest_tests/event_rules_invalid.json
@@ -0,0 +1,15 @@
+{
+  "name": "extensions_unittests --gtest_filter=DeclarativeManifestTest.Invalid",
+  "version": "1",
+  "manifest_version": 2,
+  "app": {
+    "background": {
+      "scripts": ["background.js"]
+    }
+  },
+  "event_rules": [{
+    "event": "foo",
+    "conditions": [{ "url": "test_url" }],
+    "actions": [{ "type": "action_type" }]
+  }]
+}