Implement API features for the Extension API feature system

chrome/test/data/extensions/extension_api_unittest/privileged_api_features.json

Index: chrome/test/data/extensions/extension_api_unittest/privileged_api_features.json
diff --git a/chrome/test/data/extensions/extension_api_unittest/privileged_api_features.json b/chrome/test/data/extensions/extension_api_unittest/privileged_api_features.json
new file mode 100644
index 0000000000000000000000000000000000000000..b32781d5fc8217b2e8397c4253399120374b5fc4
--- /dev/null
+++ b/chrome/test/data/extensions/extension_api_unittest/privileged_api_features.json
@@ -0,0 +1,32 @@
+{
+  "test1": {
+    "contexts": ["content_script"]
+  },
+  "test1.foo": {
+    "contexts": ["blessed_extension"]
+  },
+  "test2": {
+    "contexts": ["blessed_extension"],
+    "dependencies": ["api:test1"]
+  },
+  "test2.foo": {
+    "contexts": ["content_script"]
+  },
+  "test2.bar": {
+    "contexts": ["content_script", "blessed_extension"]
+  },
+  "test2.baz": {
+    "contexts": ["blessed_extension"],
+    "dependencies": ["api:test2.foo"]
+  },
+  "test3": {
+    "contexts": ["content_script", "blessed_extension"]
+  },
+  "test3.foo": {
+    "contexts": ["blessed_extension"]
+  },
+  "test4": {
+    "contexts": ["content_script"],
+    "dependencies": ["api:test1.foo"]
+  }
+}