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_