Add Photos to a background permission whitelist.

chrome/common/extensions/api/_permission_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.
 
 {
   "activeTab": {
     "channel": "stable",
@@ skipping 41 matching lines @@
   ],
   "autotestPrivate": {
     "channel": "stable",
     "extension_types": ["extension", "legacy_packaged_app"],
     "location": "component"
   },
   "audioCapture": {
     "channel": "stable",
     "extension_types": ["platform_app"]
   },
-  "background": {
-    "channel": "stable",
-    "extension_types": [
-      "extension", "legacy_packaged_app", "hosted_app"
-    ]
-  },
+  "background": [
+    {
+      "channel": "stable",
+      "extension_types": [
+        "extension", "legacy_packaged_app", "hosted_app"
+      ]
+    },
+    {
+      "channel": "stable",
+      "extension_types": ["platform_app"],
+      "whitelist": [
+        "5B5DA6D054D10DB917AF7D9EAE3C56044D1B0B03",  // http://crbug.com/286542
+        "2843C1E82A9B6C6FB49308FDDF4E157B6B44BC2B",  // http://crbug.com/286542
+        "3F596D221126DCDFD115CFAA2E5A3141806358AD"   // http://crbug.com/286542
+      ]
+    }
+  ],
   "bluetooth": {
     "channel": "dev",
     "extension_types": ["platform_app"]
   },
   "bluetoothDevices": {
     "channel": "dev",
     "extension_types": ["platform_app"]
   },
   "bookmarkManagerPrivate": {
     "channel": "stable",
@@ skipping 315 matching lines @@
   "mediaGalleries.copyTo": {
     "channel": "stable",
     "extension_types": [ "platform_app" ]
   },
   // TODO(thestig) Remove this as part of http://crbug.com/144496
   "mediaGalleriesPrivate": {
     "channel": "stable",
     "extension_types": [ "platform_app" ],
     "whitelist": [
       "dhgjflpimlbndbpamnkoepaacagejgda",
-      "ebpbnabdhheoknfklmpddcdijjkmklkp",  // G+ Photos staging
-      "efjnaogkjbogokcnohkmnjdojkikgobo",  // G+ Photos prod
-      "ejegoaikibpmikoejfephaneibodccma",  // G+ Photos dev
+      "5B5DA6D054D10DB917AF7D9EAE3C56044D1B0B03",  // http://crbug.com/286542
+      "2843C1E82A9B6C6FB49308FDDF4E157B6B44BC2B",  // http://crbug.com/286542
+      "3F596D221126DCDFD115CFAA2E5A3141806358AD",  // http://crbug.com/286542
       "F7FA7ABC1ECB89BA8EE6656847EFABBF43BB9BCA"
     ]
   },
   "mediaPlayerPrivate": {
     "channel": "stable",
     "extension_types": ["extension", "legacy_packaged_app"],
     "location": "component"
   },
   "metricsPrivate": {
     "channel": "stable",
@@ skipping 286 matching lines @@
   },
   "webRequestBlocking": {
     "channel": "stable",
     "extension_types": ["extension", "legacy_packaged_app"]
   },
   "webview": {
     "channel": "stable",
     "extension_types": ["platform_app"]
   }
 }