Revert of DevTools: account for the display scale factor while validating manifest under emulation.

chrome/browser/banners/app_banner_manager_emulation.h

-// Copyright 2016 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.
-
-#ifndef CHROME_BROWSER_BANNERS_APP_BANNER_MANAGER_EMULATION_H_
-#define CHROME_BROWSER_BANNERS_APP_BANNER_MANAGER_EMULATION_H_
-
-#include "chrome/browser/banners/app_banner_manager.h"
-
-#include "base/macros.h"
-#include "content/public/browser/web_contents_user_data.h"
-
-namespace banners {
-
-class AppBannerManagerEmulation
-    : public AppBannerManager,
-      public content::WebContentsUserData<AppBannerManagerEmulation> {
-
- protected:
-  AppBannerDataFetcher* CreateAppBannerDataFetcher(
-      base::WeakPtr<AppBannerDataFetcher::Delegate> weak_delegate,
-      bool is_debug_mode) override;
-
- private:
-  explicit AppBannerManagerEmulation(content::WebContents* web_contents);
-  friend class content::WebContentsUserData<AppBannerManagerEmulation>;
-
-  DISALLOW_COPY_AND_ASSIGN(AppBannerManagerEmulation);
-};
-
-}  // namespace banners
-
-#endif  // CHROME_BROWSER_BANNERS_APP_BANNER_MANAGER_EMULATION_H_