Replace implicit_cast usage with static_cast.

client/simulate_crash_mac_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 12 matching lines @@
 #include "gtest/gtest.h"
 #include "test/mac/mach_errors.h"
 #include "test/mac/mach_multiprocess.h"
 #include "util/mach/exc_server_variants.h"
 #include "util/mach/exception_behaviors.h"
 #include "util/mach/exception_ports.h"
 #include "util/mach/mach_extensions.h"
 #include "util/mach/mach_message.h"
 #include "util/mach/mach_message_server.h"
 #include "util/mach/symbolic_constants_mach.h"
+#include "util/misc/implicit_cast.h"
 
 namespace crashpad {
 namespace test {
 namespace {
 
 class TestSimulateCrashMac final : public MachMultiprocess,
                                    public UniversalMachExcServer::Interface {
  public:
   // Defines which targets the child should set an EXC_CRASH exception handler
   // for.
@@ skipping 334 matching lines @@
           test_simulate_crash_mac.Run();
         }
       }
     }
   }
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace crashpad