Remove base's ALIGNOF/ALIGNAS in favor of alignof/alignas.

third_party/crashpad/crashpad/minidump/minidump_context.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_MINIDUMP_MINIDUMP_CONTEXT_H_
 #define CRASHPAD_MINIDUMP_MINIDUMP_CONTEXT_H_
 
 #include <stdint.h>
 
-#include "base/compiler_specific.h"
 #include "snapshot/cpu_context.h"
 #include "util/numeric/int128.h"
 
 namespace crashpad {
 
 //! \brief Architecture-independent flags for `context_flags` fields in Minidump
 //!    context structures.
 //
 // http://zachsaw.blogspot.com/2010/11/wow64-bug-getthreadcontext-may-return.html#c5639760895973344002
 enum MinidumpContextFlags : uint32_t {
@@ skipping 216 matching lines @@
 //!     file.
 //!
 //! This is analogous to the `CONTEXT` structure on Windows when targeting
 //! x86_64. This structure is used instead of `CONTEXT` to make it available
 //! when targeting other architectures.
 //!
 //! \note This structure doesn’t carry `dr4` or `dr5`, which are obsolete and
 //!     normally alias `dr6` and `dr7`, respectively. See Intel Software
 //!     Developer’s Manual, Volume 3B: System Programming, Part 2 (253669-052),
 //!     17.2.2 “Debug Registers DR4 and DR5”.
-struct ALIGNAS(16) MinidumpContextAMD64 {
+struct alignas(16) MinidumpContextAMD64 {
   //! \brief Register parameter home address.
   //!
   //! On Windows, this field may contain the “home” address (on-stack, in the
   //! shadow area) of a parameter passed by register. This field is present for
   //! convenience but is not necessarily populated, even if a corresponding
   //! parameter was passed by register.
   //!
   //! \{
   uint64_t p1_home;
   uint64_t p2_home;
@@ skipping 67 matching lines @@
   uint64_t last_branch_to_rip;
   uint64_t last_branch_from_rip;
   uint64_t last_exception_to_rip;
   uint64_t last_exception_from_rip;
   //! \}
 };
 
 }  // namespace crashpad
 
 #endif  // CRASHPAD_MINIDUMP_MINIDUMP_CONTEXT_H_