Rename <browser> shim to <webview>

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.
 
 {
   "activeTab": {
     "channel": "dev",
     "extension_types": ["extension", "packaged_app"],
     "min_manifest_version": 2
   },
@@ skipping 30 matching lines @@
   },
   "bookmarkManagerPrivate": {
     "channel": "stable",
     "extension_types": ["extension", "packaged_app"],
     "location": "component"
   },
   "bookmarks": {
     "channel": "stable",
     "extension_types": ["extension", "packaged_app"]
   },
-  "browserTag": {
-    "channel": "dev",
-    "extension_types": ["extension", "platform_app"]
-  },
   "browsingData": {
     "channel": "stable",
     "extension_types": ["extension", "packaged_app"]
   },
   "chromePrivate": {
     "channel": "stable",
     "extension_types": ["extension", "packaged_app"],
     "whitelist": [
       "haiffjcadagjlijoggckpgfnoeiflnem",  // Citrix Receiver
       "gnedhmakppccajfpfiihfcdlnpgomkcf",  // Citrix Receiver Beta
@@ skipping 291 matching lines @@
       "afchcafgojfnemjkcbhfekplkmjaldaa"   // Enterprise Web Store
     ]
   },
   "webRequest": {
     "channel": "stable",
     "extension_types": ["extension", "packaged_app"]
   },
   "webRequestBlocking": {
     "channel": "stable",
     "extension_types": ["extension", "packaged_app"]
+  },
+  "webview": {
+    "channel": "dev",
+    "extension_types": ["platform_app"]
   }
 }