Move reusable part of LoginPolicyTestBase into a helper class.

chrome/browser/chromeos/policy/user_policy_test_helper.h

Index: chrome/browser/chromeos/policy/user_policy_test_helper.h
diff --git a/chrome/browser/chromeos/policy/user_policy_test_helper.h b/chrome/browser/chromeos/policy/user_policy_test_helper.h
new file mode 100644
index 0000000000000000000000000000000000000000..941a0674c3cdd5c715bbcc36d1229789a3ada223
--- /dev/null
+++ b/chrome/browser/chromeos/policy/user_policy_test_helper.h
@@ -0,0 +1,66 @@
+// Copyright 2015 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_CHROMEOS_POLICY_USER_POLICY_TEST_HELPER_H_
+#define CHROME_BROWSER_CHROMEOS_POLICY_USER_POLICY_TEST_HELPER_H_
+
+#include <string>
+
+#include "base/files/scoped_temp_dir.h"
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+
+class Profile;
+
+namespace base {
+class CommandLine;
+class FilePath;
+class DictionaryValue;
+}
+
+namespace policy {
+
+class LocalPolicyTestServer;
+
+// This class can be used to apply a user policy to the profile in a
+// BrowserTest.
+class UserPolicyTestHelper {
+ public:
+  explicit UserPolicyTestHelper(const std::string& account_id);
+  virtual ~UserPolicyTestHelper();
+
+  // Must be called after construction to start the policy test server.
+  void Init(const base::DictionaryValue& mandatory_policy,
+            const base::DictionaryValue& recommended_policy);
+
+  // Must be used during BrowserTestBase::SetUpCommandLine to direct Chrome to
+  // the policy test server.
+  void UpdateCommandLine(base::CommandLine* command_line) const;
+
+  // Can be optionally used to wait for the initial policy to be applied to the
+  // profile. Alternatively, a login can be simulated, which makes it
+  // unnecessary to call this function.
+  void WaitForInitialPolicy(Profile* profile);
+
+  // Update the policy test server with the given policy. Then refresh and wait
+  // for the new policy being applied to |profile|.
+  void UpdatePolicy(const base::DictionaryValue& mandatory_policy,
+                    const base::DictionaryValue& recommended_policy,
+                    Profile* profile);
+
+ private:
+  void WritePolicyFile(const base::DictionaryValue& mandatory,
+                       const base::DictionaryValue& recommended);
+  base::FilePath PolicyFilePath() const;
+
+  const std::string account_id_;
+  base::ScopedTempDir temp_dir_;
+  scoped_ptr<LocalPolicyTestServer> test_server_;
+
+  DISALLOW_COPY_AND_ASSIGN(UserPolicyTestHelper);
+};
+
+}  // namespace policy
+
+#endif  // CHROME_BROWSER_CHROMEOS_POLICY_USER_POLICY_TEST_HELPER_H_