Convert tabs, windows, and extension APIs to feature system.

chrome/test/data/extensions/extension_api_feature_unittest/test1.json

Index: chrome/test/data/extensions/extension_api_feature_unittest/test1.json
diff --git a/chrome/test/data/extensions/extension_api_feature_unittest/test1.json b/chrome/test/data/extensions/extension_api_feature_unittest/test1.json
new file mode 100644
index 0000000000000000000000000000000000000000..8009637cd1ef2d77320385d1e80b2005ddff6f13
--- /dev/null
+++ b/chrome/test/data/extensions/extension_api_feature_unittest/test1.json
@@ -0,0 +1,18 @@
+{
+  "dependencies": ["foo", "bar", "monkey"],
+  "extension_types": ["extension"],
+  "contexts": ["blessed_extension"],
+  "functions": [
+    {
+      "name": "function",
+      "extension_types": ["packaged_app"]
+    }
+  ],
+  "events": [
+    {
+      "name": "event",
+      "contexts": ["unblessed_extension"],
+      "dependencies": ["permission:whatever"]
+    }
+  ]
+}