Use C++11 alignment primitives

cc/raster/texture_compressor_etc1_sse.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/raster/texture_compressor_etc1_sse.h"
 
 #include <emmintrin.h>
 #include <stdint.h>
 
 #include "base/compiler_specific.h"
@@ skipping 772 matching lines @@
 void TextureCompressorETC1SSE::Compress(const uint8_t* src,
                                         uint8_t* dst,
                                         int width,
                                         int height,
                                         Quality quality) {
   DCHECK_GE(width, 4);
   DCHECK_EQ((width & 3), 0);
   DCHECK_GE(height, 4);
   DCHECK_EQ((height & 3), 0);
 
-  ALIGNAS(16) uint8_t block[64];
+  alignas(16) uint8_t block[64];
   __m128i packed[4];
   __m128i red[4], green[4], blue[4], alpha[4];
   __sse_data data;
 
   for (int y = 0; y < height; y += 4, src += width * 4 * 4) {
     for (int x = 0; x < width; x += 4, dst += 8) {
       ExtractBlock(block, src + x * 4, width);
       if (TransposeBlock(block, packed) == false) {
         CompressSolid(dst, block);
       } else {
         UnpackBlock(packed, blue, green, red, alpha);
 
         data.block = block;
         data.packed = packed;
         data.red = red;
         data.blue = blue;
         data.green = green;
 
         CompressBlock(dst, &data);
       }
     }
   }
 }
 
 }  // namespace cc