Improve map insertions

snapshot/minidump/process_snapshot_minidump.cc

 // Copyright 2015 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 291 matching lines @@
           &minidump_links[0],
           crashpad_module_count * sizeof(MinidumpModuleCrashpadInfoLink))) {
     return false;
   }
 
   for (uint32_t crashpad_module_index = 0;
        crashpad_module_index < crashpad_module_count;
        ++crashpad_module_index) {
     const MinidumpModuleCrashpadInfoLink& minidump_link =
         minidump_links[crashpad_module_index];
-    if (module_crashpad_info_links->find(
-            minidump_link.minidump_module_list_index) !=
-        module_crashpad_info_links->end()) {
+    if (!module_crashpad_info_links
+             ->insert(std::make_pair(minidump_link.minidump_module_list_index,
+                                     minidump_link.location)).second) {
       LOG(WARNING)
           << "duplicate module_crashpad_info_list minidump_module_list_index "
           << minidump_link.minidump_module_list_index;
       return false;
-    } else {
-      module_crashpad_info_links->insert(std::make_pair(
-          minidump_link.minidump_module_list_index, minidump_link.location));
     }
   }
 
   return true;
 }
 
 }  // namespace crashpad