Improve map insertions

tools/mac/run_with_crashpad.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,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
 #include <errno.h>
 #include <getopt.h>
 #include <libgen.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "client/crashpad_client.h"
 #include "tools/tool_support.h"
+#include "util/stdlib/map_insert.h"
 #include "util/string/split_string.h"
 
 namespace crashpad {
 namespace {
 
 void Usage(const std::string& me) {
   fprintf(stderr,
 "Usage: %s [OPTION]... COMMAND [ARG]...\n"
 "Start a Crashpad handler and have it handle crashes from COMMAND.\n"
 "\n"
@@ skipping 71 matching lines @@
         options.handler = optarg;
         break;
       }
       case kOptionAnnotation: {
         std::string key;
         std::string value;
         if (!SplitString(optarg, '=', &key, &value)) {
           ToolSupport::UsageHint(me, "--annotation requires KEY=VALUE");
           return EXIT_FAILURE;
         }
-        auto it = options.annotations.find(key);
-        if (it != options.annotations.end()) {
+        std::string old_value;
+        if (!MapInsertOrReplace(&options.annotations, key, value, &old_value)) {
           LOG(WARNING) << "duplicate key " << key << ", discarding value "
-                       << it->second;
-          it->second = value;
-        } else {
-          options.annotations.insert(std::make_pair(key, value));
+                       << old_value;
         }
         break;
       }
       case kOptionDatabase: {
         options.database = optarg;
         break;
       }
       case kOptionURL: {
         options.url = optarg;
         break;
@@ skipping 44 matching lines @@
   PLOG(ERROR) << "execvp " << argv[0];
   return errno == ENOENT ? kExitExecENOENT : kExitExecFailure;
 }
 
 }  // namespace
 }  // namespace crashpad
 
 int main(int argc, char* argv[]) {
   return crashpad::RunWithCrashpadMain(argc, argv);
 }