Fail tests fast if overriding the Windows registry fails.

chrome/browser/safe_browsing/incident_reporting/incident_reporting_service_unittest.cc

 // 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.
 
 #include "chrome/browser/safe_browsing/incident_reporting/incident_reporting_service.h"
 
 #include <stdint.h>
 
 #include <map>
 #include <string>
@@ skipping 194 matching lines @@
         download_finder_created_(),
         download_finder_destroyed_(),
         uploader_destroyed_(),
         delayed_analysis_ran_() {}
 
   void SetUp() override {
     testing::Test::SetUp();
 #if defined(OS_WIN)
     // Redirect HKCU so that the platform state store used by the test doesn't
     // collide with existing Chrome installs or other tests running in parallel.
-    registry_override_manager_.OverrideRegistry(HKEY_CURRENT_USER);
+    ASSERT_NO_FATAL_FAILURE(
+        registry_override_manager_.OverrideRegistry(HKEY_CURRENT_USER));
 #endif
     ASSERT_TRUE(profile_manager_.SetUp());
   }
 
   void SetFieldTrialAndCreateService(bool enabled) {
     field_trial_list_.reset(
         new base::FieldTrialList(
             base::MakeUnique<base::MockEntropyProvider>()));
     field_trial_ = base::FieldTrialList::CreateFieldTrial(
         "SafeBrowsingIncidentReportingService",
@@ skipping 1265 matching lines @@
 
   // Ensure that no report processing remains.
   ASSERT_FALSE(instance_->IsProcessingReport());
 }
 
 // Parallel uploads
 // Shutdown during processing
 // environment colection taking longer than incident delay timer
 // environment colection taking longer than incident delay timer, and then
 // another incident arriving