GTTF: Use a fresh TestingBrowserProcess for each test, part #6

chrome/browser/chromeos/login/signed_settings_helper_unittest.cc

Index: chrome/browser/chromeos/login/signed_settings_helper_unittest.cc
diff --git a/chrome/browser/chromeos/login/signed_settings_helper_unittest.cc b/chrome/browser/chromeos/login/signed_settings_helper_unittest.cc
index f0db486b0b506550e700f2d8fcf54503f9646495..6715d9f6b102528c2a4eb49d8d7e8d741c8e0a77 100644
--- a/chrome/browser/chromeos/login/signed_settings_helper_unittest.cc
+++ b/chrome/browser/chromeos/login/signed_settings_helper_unittest.cc
@@ -11,6 +11,7 @@
 #include "chrome/browser/chromeos/login/signed_settings.h"
 #include "chrome/browser/policy/proto/chrome_device_policy.pb.h"
 #include "chrome/browser/policy/proto/device_management_backend.pb.h"
+#include "chrome/test/base/testing_browser_process_test.h"
 #include "content/browser/browser_thread.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -46,7 +47,7 @@ class MockSignedSettingsHelperCallback : public SignedSettingsHelper::Callback {
       const std::string& value));
 };
 
-class SignedSettingsHelperTest : public ::testing::Test,
+class SignedSettingsHelperTest : public TestingBrowserProcessTest,
                                  public SignedSettingsHelper::TestDelegate {
  public:
   SignedSettingsHelperTest()