Step 1 of opts_crc32 rollout.

gyp/opts.gyp

 # Copyright 2015 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 # Gyp file for building opts target.
 {
   # Source lists live in opts.gypi.  This makes it easier to maintain our Chrome GYP/GN setup.
   # (To be honest, I'm not sure why we need to include common.gypi.  I thought it was automatic.)
   'variables': {
     'includes': [ 'common.gypi', 'opts.gypi' ],
@@ skipping 53 matching lines @@
           'sources': [ '<@(armv7_sources)' ],
           'conditions': [
             [ 'arm_neon == 1', {
               'dependencies': [ 'opts_neon' ]
             }],
           ],
         }],
 
         [ 'skia_arch_type == "arm64"', {
           'sources': [ '<@(arm64_sources)' ],
+          'dependencies': [ 'opts_crc32' ]
         }],
 
         [ 'skia_android_framework', {
           'cflags!': [
             '-msse2',
             '-mfpu=neon',
             '-fomit-frame-pointer',
           ]
         }],
       ],
     },
     {
+      'target_name': 'opts_crc32',
+      'product_name': 'skia_opts_crc32',
+      'type': 'static_library',
+      'standalone_static_library': 1,
+      'dependencies': [ 'core.gyp:*' ],
+      'include_dirs': [
+          '../include/private',
+          '../src/core',
+          '../src/utils',
+      ],
+      'sources': [ '<@(crc32_sources)' ],
+      'conditions': [
+        [ 'not skia_android_framework', { 'cflags': [ '-march=armv8-a+crc' ] }],
+      ],
+    },
+    {
       'target_name': 'opts_ssse3',
       'product_name': 'skia_opts_ssse3',
       'type': 'static_library',
       'standalone_static_library': 1,
       'dependencies': [ 'core.gyp:*' ],
       'include_dirs': [
           '../include/private',
           '../src/core',
           '../src/utils',
       ],
@@ skipping 105 matching lines @@
           ],
         }],
       ],
       'ldflags': [
         '-march=armv7-a',
         '-Wl,--fix-cortex-a8',
       ],
     },
   ],
 }