Use alignas to force alignment.

include/core/SkPostConfig.h

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 // IWYU pragma: private, include "SkTypes.h"
 
 #ifndef SkPostConfig_DEFINED
@@ skipping 59 matching lines @@
 #endif
 
 #if !defined(SK_ATTRIBUTE)
 #  if defined(__clang__) || defined(__GNUC__)
 #    define SK_ATTRIBUTE(attr) __attribute__((attr))
 #  else
 #    define SK_ATTRIBUTE(attr)
 #  endif
 #endif
 
-// As usual, there are two ways to increase alignment... the MSVC way and the everyone-else way.
-#ifndef SK_STRUCT_ALIGN
-    #ifdef _MSC_VER
-        #define SK_STRUCT_ALIGN(N) __declspec(align(N))
-    #else
-        #define SK_STRUCT_ALIGN(N) __attribute__((aligned(N)))
-    #endif
-#endif
-
 #if defined(_MSC_VER) && SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2
     #define SK_VECTORCALL __vectorcall
 #elif defined(SK_CPU_ARM32) && defined(SK_ARM_HAS_NEON)
     #define SK_VECTORCALL __attribute__((pcs("aapcs-vfp")))
 #else
     #define SK_VECTORCALL
 #endif
 
 #if !defined(SK_SUPPORT_GPU)
 #  define SK_SUPPORT_GPU 1
@@ skipping 263 matching lines @@
 
 #ifndef SK_HISTOGRAM_BOOLEAN
 #  define SK_HISTOGRAM_BOOLEAN(name, value)
 #endif
 
 #ifndef SK_HISTOGRAM_ENUMERATION
 #  define SK_HISTOGRAM_ENUMERATION(name, value, boundary_value)
 #endif
 
 #endif // SkPostConfig_DEFINED