Enable the views-based AppInfoDialog on Mac

chrome/browser/ui/cocoa/apps/app_info_dialog_cocoa.mm

-// Copyright 2014 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.
-
-#include "base/logging.h"
-#include "chrome/browser/ui/apps/app_info_dialog.h"
-#include "ui/gfx/geometry/size.h"
-
-bool CanShowAppInfoDialog() {
-  return false;
-}
-
-gfx::Size GetAppInfoNativeDialogSize() {
-  return gfx::Size();
-}
-
-void ShowAppInfoInAppList(gfx::NativeWindow parent,
-                          const gfx::Rect& app_list_bounds,
-                          Profile* profile,
-                          const extensions::Extension* app,
-                          const base::Closure& close_callback) {
-  // TODO(sashab): Implement the App Info dialog on Mac.
-  NOTIMPLEMENTED();
-}
-
-void ShowAppInfoInNativeDialog(gfx::NativeWindow parent,
-                               const gfx::Size& size,
-                               Profile* profile,
-                               const extensions::Extension* app,
-                               const base::Closure& close_callback) {
-  // TODO(sashab): Implement the App Info dialog on Mac.
-  NOTIMPLEMENTED();
-}