Fail tests fast if overriding the Windows registry fails.

components/browser_watcher/watcher_metrics_provider_win_unittest.cc

 // Copyright (c) 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 "components/browser_watcher/watcher_metrics_provider_win.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <cstdlib>
@@ skipping 16 matching lines @@
 
 const wchar_t kRegistryPath[] = L"Software\\WatcherMetricsProviderWinTest";
 
 class WatcherMetricsProviderWinTest : public testing::Test {
  public:
   typedef testing::Test Super;
 
   void SetUp() override {
     Super::SetUp();
 
-    override_manager_.OverrideRegistry(HKEY_CURRENT_USER);
+    ASSERT_NO_FATAL_FAILURE(
+        override_manager_.OverrideRegistry(HKEY_CURRENT_USER));
     test_task_runner_ = new base::TestSimpleTaskRunner();
   }
 
   void AddProcessExitCode(bool use_own_pid, int exit_code) {
     int pid = 0;
     if (use_own_pid) {
       pid = base::GetCurrentProcId();
     } else {
       // Make sure not to accidentally collide with own pid.
       do {
@@ skipping 94 matching lines @@
 
   // Flush the task(s).
   test_task_runner_->RunPendingTasks();
 
   // Make sure the subkey for the pseudo process has been deleted on reporting.
   ASSERT_EQ(ERROR_FILE_NOT_FOUND,
             key.Open(HKEY_CURRENT_USER, kRegistryPath, KEY_READ));
 }
 
 }  // namespace browser_watcher