C++11: Use type aliases instead of typedefs

client/capture_context_mac.h

 // 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.
 
 #ifndef CRASHPAD_CLIENT_CAPTURE_CONTEXT_MAC_H_
 #define CRASHPAD_CLIENT_CAPTURE_CONTEXT_MAC_H_
 
 #include <mach/mach.h>
 
 #include "build/build_config.h"
 
 namespace crashpad {
 
 #if defined(ARCH_CPU_X86_FAMILY)
-typedef x86_thread_state NativeCPUContext;
+using NativeCPUContext = x86_thread_state;
 #endif
 
 //! \brief Saves the CPU context.
 //!
 //! The CPU context will be captured as accurately and completely as possible,
 //! containing an atomic snapshot at the point of this function’s return. This
 //! function does not modify any registers.
 //!
 //! \param[out] cpu_context The structure to store the context in.
 //!
 //! \note On x86_64, the value for `%%rdi` will be populated with the address of
 //!     this function’s argument, as mandated by the ABI. If the value of
 //!     `%%rdi` prior to calling this function is needed, it must be obtained
 //!     separately prior to calling this function. For example:
 //!     \code
 //!       uint64_t rdi;
 //!       asm("movq %%rdi, %0" : "=m"(rdi));
 //!     \endcode
 void CaptureContext(NativeCPUContext* cpu_context);
 
 }  // namespace crashpad
 
 #endif  // CRASHPAD_CLIENT_CAPTURE_CONTEXT_MAC_H_