<webview>: Update manifest doc

This CL ensures that the manifest documentation refers to the webview documentation for the webview section.

BUG=362708

Review URL: https://codereview.chromium.org/376673003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@281754 0039d316-1c4b-4281-b951-d872f2087c98

chrome/common/extensions/docs/templates/json/manifest.json

@@ -191,5 +191,9 @@
   "web_accessible_resources": {
     "documentation": "manifest/web_accessible_resources.html",
     "example": []
+  },
+  "webview": {
+    "documentation": "tags/web_view#local_resources",
+    "example": {}
   }
 }