snapshot: Add a minimal ModuleSnapshotMinidump and accessor from ProcessSnapshotMinidump

snapshot/mac/process_snapshot_mac.cc

 // Copyright 2014 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 126 matching lines @@
 const ExceptionSnapshot* ProcessSnapshotMac::Exception() const {
   INITIALIZATION_STATE_DCHECK_VALID(initialized_);
   return exception_.get();
 }
 
 void ProcessSnapshotMac::InitializeThreads() {
   const std::vector<ProcessReader::Thread>& process_reader_threads =
       process_reader_.Threads();
   for (const ProcessReader::Thread& process_reader_thread :
        process_reader_threads) {
-    internal::ThreadSnapshotMac* thread = new internal::ThreadSnapshotMac();
-    threads_.push_back(thread);
-    if (!thread->Initialize(&process_reader_, process_reader_thread)) {
-      threads_.pop_back();
+    auto thread = make_scoped_ptr(new internal::ThreadSnapshotMac());
+    if (thread->Initialize(&process_reader_, process_reader_thread)) {
+      threads_.push_back(thread.release());
     }
   }
 }
 
 void ProcessSnapshotMac::InitializeModules() {
   const std::vector<ProcessReader::Module>& process_reader_modules =
       process_reader_.Modules();
   for (const ProcessReader::Module& process_reader_module :
        process_reader_modules) {
-    internal::ModuleSnapshotMac* module = new internal::ModuleSnapshotMac();
-    modules_.push_back(module);
-    if (!module->Initialize(&process_reader_, process_reader_module)) {
-      modules_.pop_back();
+    auto module = make_scoped_ptr(new internal::ModuleSnapshotMac());
+    if (module->Initialize(&process_reader_, process_reader_module)) {
+      modules_.push_back(module.release());
     }
   }
 }
 
 }  // namespace crashpad