Add getSelf method to management API to use without the "management" permission.

chrome/common/extensions/api/management.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":"management",
     "description": "The <code>chrome.management</code> API provides ways to manage the list of extensions/apps that are installed and running. It is particularly useful for extensions that <a href='override'>override</a> the built-in New Tab page.",
     "types": [
       {
@@ skipping 163 matching lines @@
             "parameters": [
               {
                 "name": "result",
                 "$ref": "ExtensionInfo"
               }
             ]
           }
         ]
       },
       {
+        "name": "getSelf",
+        "description": "Returns information about the calling extension, app, or theme. Note: This function can be used without requesting the 'management' permission in the manifest.",
+        "parameters": [
+          {
+            "type": "function",
+            "name": "callback",
+            "optional": true,
+            "parameters": [
+              {
+                "name": "result",
+                "$ref": "ExtensionInfo"
+              }
+            ]
+          }
+        ]
+      },
+      {
         "name": "getPermissionWarningsById",
         "description": "Returns a list of <a href='permission_warnings'>permission warnings</a> for the given extension id.",
         "parameters": [
           { "name": "id",
             "type": "string",
             "description": "The ID of an already installed extension."
           },
           {
             "name": "callback",
             "type": "function",
@@ skipping 217 matching lines @@
       },
       {
         "name": "onDisabled",
         "description": "Fired when an app or extension has been disabled.",
         "type": "function",
         "parameters": [{"name": "info", "$ref":"ExtensionInfo"}]
       }
     ]
   }
 ]