Remove all the ephemeral apps code.

chrome/browser/apps/ephemeral_app_browsertest.h

-// 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.
-
-#ifndef CHROME_BROWSER_APPS_EPHEMERAL_APP_BROWSERTEST_H_
-#define CHROME_BROWSER_APPS_EPHEMERAL_APP_BROWSERTEST_H_
-
-#include <string>
-
-#include "base/files/file_path.h"
-#include "chrome/browser/apps/app_browsertest_util.h"
-#include "extensions/common/manifest.h"
-
-namespace base {
-class CommandLine;
-}
-
-// Contains common code for ephemeral app browser tests.
-class EphemeralAppTestBase : public extensions::PlatformAppBrowserTest {
- public:
-  static const char kMessagingReceiverApp[];
-  static const char kMessagingReceiverAppV2[];
-  static const char kDispatchEventTestApp[];
-  static const char kNotificationsTestApp[];
-  static const char kFileSystemTestApp[];
-
-  EphemeralAppTestBase();
-  ~EphemeralAppTestBase() override;
-
-  void SetUpCommandLine(base::CommandLine* command_line) override;
-  void SetUpOnMainThread() override;
-
- protected:
-  base::FilePath GetTestPath(const char* test_path);
-
-  const extensions::Extension* InstallEphemeralApp(
-      const char* test_path, extensions::Manifest::Location manifest_location);
-  const extensions::Extension* InstallEphemeralApp(const char* test_path);
-  const extensions::Extension* InstallAndLaunchEphemeralApp(
-      const char* test_path);
-  const extensions::Extension*  UpdateEphemeralApp(
-      const std::string& app_id,
-      const base::FilePath& test_dir,
-      const base::FilePath& pem_path);
-  void PromoteEphemeralApp(const extensions::Extension* app);
-  void DisableEphemeralApp(const extensions::Extension* app,
-                           extensions::Extension::DisableReason disable_reason);
-
-  void CloseAppWaitForUnload(const std::string& app_id);
-  void CloseApp(const std::string& app_id);
-  void EvictApp(const std::string& app_id);
-};
-
-#endif  // CHROME_BROWSER_APPS_EPHEMERAL_APP_BROWSERTEST_H_