Remove whitelist restriction for Shared Modules on dev channel.

chrome/common/extensions/api/_manifest_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.
 
 {
   "app": {
     "channel": "stable",
@@ skipping 128 matching lines @@
       "location": "component"
     },
     {
       "channel": "stable",
       "extension_types": ["packaged_app", "platform_app"],
       "whitelist": [
         "nmmhkkegccagdldgiimedpiccmgmieda"
       ]
     }
   ],
-  "export": {
-    "channel": "stable",
-    "extension_types": ["shared_module"],
-    "whitelist": [
-      "gpcckkmippodnppallflahfabmeilgjg", // browser and unit tests
-      "6EAED1924DB611B6EEF2A664BD077BE7EAD33B8F"
-    ]
-  },
+  "export": [
+    {
+      "channel": "stable",
+      "extension_types": ["shared_module"],
+      "whitelist": [
+        "6EAED1924DB611B6EEF2A664BD077BE7EAD33B8F",
+        "4EB74897CB187C7633357C2FE832E0AD6A44883A"
+      ]
+    },
+    {
+      "channel": "dev",
+      "extension_types": ["shared_module"]
+    }
+  ],
   "externally_connectable": {
     "channel": "stable",
     "extension_types": [
       "extension", "hosted_app", "packaged_app", "platform_app"
     ]
   },
   "file_browser_handlers": {
     "channel": "stable",
     "extension_types": ["extension", "packaged_app"]
   },
@@ skipping 184 matching lines @@
     "channel": "stable",
     "extension_types": "all"
   },
   "web_accessible_resources": {
     "channel": "stable",
     "extension_types": [
       "extension", "packaged_app", "hosted_app"
     ]
   }
 }