Include implicit_cast.h at all users of it.

util/mach/notify_server_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,
 // 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 "util/mach/notify_server.h"
 
 #include "base/compiler_specific.h"
 #include "base/mac/scoped_mach_port.h"
 #include "gmock/gmock.h"
 #include "gtest/gtest.h"
 #include "test/mac/mach_errors.h"
 #include "util/mach/mach_extensions.h"
 #include "util/mach/mach_message.h"
 #include "util/mach/mach_message_server.h"
+#include "util/misc/implicit_cast.h"
 
 namespace crashpad {
 namespace test {
 namespace {
 
 using testing::AllOf;
 using testing::Eq;
 using testing::Invoke;
 using testing::Pointee;
 using testing::ResultOf;
@@ skipping 512 matching lines @@
 
   EXPECT_FALSE(IsRight(send_once_right, MACH_PORT_TYPE_DEAD_NAME));
 
   EXPECT_EQ(1u, RightRefCount(send_once_right, MACH_PORT_RIGHT_SEND_ONCE));
   EXPECT_EQ(0u, DeadNameRightRefCount(send_once_right));
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace crashpad