<webview>: Update format for local file access in manifest.json

The new format is:


"webview" : {
   "partitions" : [
      {
           "name" : "foo*",
           "accessible_resources" : ["a.html", "b.html"]
      },
      {
           "name" : "bar",
           "accessible_resources" : ["a.html", "c.html"]
      }
   ]
}

BUG=340291

Review URL: https://codereview.chromium.org/151923005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249640 0039d316-1c4b-4281-b951-d872f2087c98
drive: Ensure using "/special/drive-hash" style path even in single-profile.

BUG=341284

Review URL: https://codereview.chromium.org/152853005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249641 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249641