Use implicit_cast<> instead of static_cast<> whenever possible

util/test/mac/mach_multiprocess.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 121 matching lines @@
   ASSERT_EQ(MACH_MSG_SUCCESS, kr) << MachErrorMessage(kr, "mach_msg");
 
   // Comb through the entire message, checking every field against its expected
   // value.
   EXPECT_EQ(MACH_MSGH_BITS(MACH_MSG_TYPE_MOVE_SEND, MACH_MSG_TYPE_MOVE_SEND) |
                 MACH_MSGH_BITS_COMPLEX,
             message.header.msgh_bits);
   ASSERT_EQ(sizeof(SendHelloMessage), message.header.msgh_size);
   EXPECT_EQ(info_->local_port, message.header.msgh_local_port);
   ASSERT_EQ(1u, message.body.msgh_descriptor_count);
-  EXPECT_EQ(static_cast<mach_msg_type_name_t>(MACH_MSG_TYPE_MOVE_SEND),
+  EXPECT_EQ(implicit_cast<mach_msg_type_name_t>(MACH_MSG_TYPE_MOVE_SEND),
             message.port_descriptor.disposition);
-  ASSERT_EQ(static_cast<mach_msg_descriptor_type_t>(MACH_MSG_PORT_DESCRIPTOR),
+  ASSERT_EQ(implicit_cast<mach_msg_descriptor_type_t>(MACH_MSG_PORT_DESCRIPTOR),
             message.port_descriptor.type);
-  ASSERT_EQ(static_cast<mach_msg_trailer_type_t>(MACH_MSG_TRAILER_FORMAT_0),
+  ASSERT_EQ(implicit_cast<mach_msg_trailer_type_t>(MACH_MSG_TRAILER_FORMAT_0),
             message.audit_trailer.msgh_trailer_type);
   ASSERT_EQ(sizeof(message.audit_trailer),
             message.audit_trailer.msgh_trailer_size);
   EXPECT_EQ(0u, message.audit_trailer.msgh_seqno);
 
   // Check the audit trailer’s values for sanity. This is a little bit of
   // overkill, but because the service was registered with the bootstrap server
   // and other processes will be able to look it up and send messages to it,
   // these checks disambiguate genuine failures later on in the test from those
   // that would occur if an errant process sends a message to this service.
@@ skipping 113 matching lines @@
   if (testing::Test::HasFailure()) {
     // Trigger the ScopedForbidReturn destructor.
     return;
   }
 
   forbid_return.Disarm();
 }
 
 }  // namespace test
 }  // namespace crashpad