Removing the Dev channel restriction for requestBody of Web Request API.

chrome/common/extensions/api/web_request.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.
 
 [
   {
     "namespace": "webRequest",
     "properties": {
       "MAX_HANDLER_BEHAVIOR_CHANGED_CALLS_PER_10_MINUTES": {
         "value": 20,
@@ skipping 116 matching lines @@
             "name": "details",
             "properties": {
               "requestId": {"type": "string", "description": "The ID of the request. Request IDs are unique within a browser session. As a result, they could be used to relate different events of the same request."},
               "url": {"type": "string"},
               "method": {"type": "string", "description": "Standard HTTP method."},
               "frameId": {"type": "integer", "description": "The value 0 indicates that the request happens in the main frame; a positive value indicates the ID of a subframe in which the request happens. If the document of a (sub-)frame is loaded (<code>type</code> is <code>main_frame</code> or <code>sub_frame</code>), <code>frameId</code> indicates the ID of this frame, not the ID of the outer frame. Frame IDs are unique within a tab."},
               "parentFrameId": {"type": "integer", "description": "ID of frame that wraps the frame which sent the request. Set to -1 if no parent frame exists."},
               "requestBody": {
                 "type": "object",
                 "optional": true,
-                "description": "Contains the HTTP request body data. Experimental feature, only available in DEV or CANARY channels. Only provided if extraInfoSpec contains 'requestBody'.",
+                "description": "Contains the HTTP request body data. Only provided if extraInfoSpec contains 'requestBody'.",
                 "properties": {
                   "error": {"type": "string", "optional": true, "description": "Errors when obtaining request body data."},
                   "formData": {
                     "type": "object",
                     "optional": true,
                     "description": "If the request method is POST and the body is a sequence of key-value pairs encoded in UTF8, encoded as either multipart/form-data, or application/x-www-form-urlencoded, this dictionary is present and for each key contains the list of all values for that key. If the data is of another media type, or if it is malformed, the dictionary is not present. An example value of this dictionary is {'key': ['value1', 'value2']}.",
                     "properties": {},
                     "additionalProperties": {
                       "type": "array",
                       "items": { "type": "string" }
@@ skipping 385 matching lines @@
           {
             "$ref": "RequestFilter",
             "name": "filter",
             "description": "A set of filters that restricts the events that will be sent to this listener."
           }
         ]
       }
     ]
   }
 ]