Docserver: Consolidate features caching and access.

chrome/common/extensions/api/_api_features.json

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // See c/c/e/features/* to understand this file, in particular feature.h,
 // simple_feature.h, and base_feature_provider.h.
 
 {
   "activityLogPrivate": {
     "dependencies": ["permission:activityLogPrivate"],
@@ skipping 135 matching lines @@
     "contexts": ["blessed_extension"]
   },
   "desktopCapture": {
     "dependencies": ["permission:desktopCapture"],
     "contexts": ["blessed_extension"]
   },
   "developerPrivate": {
     "dependencies": ["permission:developerPrivate"],
     "contexts": ["blessed_extension"]
   },
+  "devtools.inspectedWindow": {
+    "extension_types": ["extension"]
+  },
+  "devtools.network": {
+    "extension_types": ["extension"]
+  },
+  "devtools.panels": {
+    "extension_types": ["extension"]
+  },
   "diagnostics": {
     "dependencies": ["permission:diagnostics"],
     "extension_types": ["platform_app"],
     "contexts": ["blessed_extension"]
   },
   "dial": {
     "dependencies": ["permission:dial"],
     "contexts": ["blessed_extension"]
   },
   "dns": {
@@ skipping 451 matching lines @@
   "webview": {
     "internal": true,
     "dependencies": ["permission:webview"],
     "contexts": ["blessed_extension", "unblessed_extension"]
   },
   "windows": {
     "dependencies": ["api:tabs"],
     "contexts": ["blessed_extension"]
   }
 }