[Mac] Use Crashpad in the AlertNotificationService.xpc.

components/crash/content/app/crashpad.cc

 // 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.
 
 #include "components/crash/content/app/crashpad.h"
 
 #include <stddef.h>
 #include <string.h>
 
 #include <algorithm>
@@ skipping 186 matching lines @@
   InitializeCrashpadImpl(initial_client, process_type, false);
 }
 
 #if defined(OS_WIN)
 void InitializeCrashpadWithEmbeddedHandler(bool initial_client,
                                            const std::string& process_type) {
   InitializeCrashpadImpl(initial_client, process_type, true);
 }
 #endif  // OS_WIN
 
+crashpad::CrashpadClient& GetCrashpadClient() {
+  static crashpad::CrashpadClient* const client =
+      new crashpad::CrashpadClient();
+  return *client;
+}
+
 void SetUploadConsent(bool consent) {
   if (!g_database)
     return;
 
   bool enable_uploads = false;
   CrashReporterClient* crash_reporter_client = GetCrashReporterClient();
   if (!crash_reporter_client->ReportingIsEnforcedByPolicy(&enable_uploads)) {
     // Breakpad provided a --disable-breakpad switch to disable crash dumping
     // (not just uploading) here. Crashpad doesn't need it: dumping is enabled
     // unconditionally and uploading is gated on consent, which tests/bots
@@ skipping 114 matching lines @@
 
 // This helper is invoked by code in chrome.dll to request a single crash report
 // upload. See CrashUploadListCrashpad.
 void __declspec(dllexport)
     RequestSingleCrashUploadImpl(const std::string& local_id) {
   crash_reporter::RequestSingleCrashUpload(local_id);
 }
 }  // extern "C"
 
 #endif  // OS_WIN