Handle amex_disallowed field in Wallet response.

BUG=286438

Review URL: https://chromiumcodereview.appspot.com/24163003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224598 0039d316-1c4b-4281-b951-d872f2087c98
Files.app: Create the FileManagerView class.

This CL creates the FileManagerView class that will be the root of FileManager's
view and moves the dialog boxes into the class.

BUG=295461
TEST=manually

Review URL: https://chromiumcodereview.appspot.com/24277004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224599 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 224599