ChromeOS: Per-user time zone: refactor tests first.

chrome/browser/chromeos/extensions/public_session_permission_helper_unittest.cc

 // Copyright 2017 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 "chrome/browser/chromeos/extensions/public_session_permission_helper.h"
 
 #include <memory>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 101 matching lines @@
   base::WeakPtr<ProgrammableInstallPrompt> CallHandlePermissionRequest(
       const scoped_refptr<Extension>& extension,
       const PermissionIDSet& permissions);
 
  protected:
   scoped_refptr<Extension> extension_a_;
   scoped_refptr<Extension> extension_b_;
 
   std::vector<PermissionIDSet> allowed_permissions_;
 
-  chromeos::ScopedTestPublicSessionLoginState login_state_;
+  std::unique_ptr<chromeos::ScopedTestPublicSessionLoginState> login_state_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(PublicSessionPermissionHelperTest);
 };
 
 void PublicSessionPermissionHelperTest::SetUp() {
   ChromeRenderViewHostTestHarness::SetUp();
+  login_state_.reset(new chromeos::ScopedTestPublicSessionLoginState());
   extension_a_ = LoadManifestHelper("extension_a");
   extension_b_ = LoadManifestHelper("extension_b");
 }
 
 void PublicSessionPermissionHelperTest::TearDown() {
+  login_state_.reset();
   ResetPermissionsForTesting();
   ChromeRenderViewHostTestHarness::TearDown();
 }
 
 void PublicSessionPermissionHelperTest::RequestResolved(
     const PermissionIDSet& allowed_permissions) {
   allowed_permissions_.push_back(allowed_permissions);
 }
 
 std::unique_ptr<ExtensionInstallPrompt>
@@ skipping 164 matching lines @@
     EXPECT_FALSE(PermissionAllowed(extension.get(), permission_b));
   }
   // Already handled (deny), doesn't show a prompt.
   EXPECT_TRUE(HandlePermissionRequest(*extension, {permission_b},
                                       web_contents(), RequestResolvedCallback(),
                                       PromptFactory()));
 }
 
 }  // namespace permission_helper
 }  // namespace extensions