Use LockFile/UnlockFile for Settings to port to Windows

util/misc/uuid_test.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 135 matching lines @@
   EXPECT_EQ(0x4545u, uuid.data_3);
   EXPECT_EQ(0x45u, uuid.data_4[0]);
   EXPECT_EQ(0x45u, uuid.data_4[1]);
   EXPECT_EQ(0x45u, uuid.data_5[0]);
   EXPECT_EQ(0x45u, uuid.data_5[1]);
   EXPECT_EQ(0x45u, uuid.data_5[2]);
   EXPECT_EQ(0x45u, uuid.data_5[3]);
   EXPECT_EQ(0x45u, uuid.data_5[4]);
   EXPECT_EQ(0x45u, uuid.data_5[5]);
   EXPECT_EQ("45454545-4545-4545-4545-454545454545", uuid.ToString());
+
+  UUID initialized_generated(UUID::InitializeWithNewTag{});
+  EXPECT_NE(initialized_generated, uuid_zero);
 }
 
 TEST(UUID, FromString) {
   const struct TestCase {
     const char* uuid_string;
     bool success;
   } kCases[] = {
     // Valid:
     {"c6849cb5-fe14-4a79-8978-9ae6034c521d", true},
     {"00000000-0000-0000-0000-000000000000", true},
@@ skipping 62 matching lines @@
   ScopedRpcString scoped_system_string(&system_string);
 
   EXPECT_EQ(reinterpret_cast<wchar_t*>(system_string), uuid.ToString16());
 }
 
 #endif  // OS_WIN
 
 }  // namespace
 }  // namespace test
 }  // namespace crashpad