Enable build with shared libraries.

test/unittests/unittests.gyp

 # Copyright 2014 the V8 project authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # The sources are kept automatically in sync with BUILD.gn.
 
 {
   'variables': {
     'v8_code': 1,
     'unittests_sources': [  ### gcmole(all) ###
@@ skipping 174 matching lines @@
       'type': 'executable',
       'variables': {
         'optimize': 'max',
       },
       'dependencies': [
         '../../testing/gmock.gyp:gmock',
         '../../testing/gtest.gyp:gtest',
         '../../src/v8.gyp:v8',
         '../../src/v8.gyp:v8_libbase',
         '../../src/v8.gyp:v8_libplatform',
+        '../../src/v8.gyp:v8_maybe_snapshot',
       ],
       'include_dirs': [
         '../..',
       ],
       'sources': [
         '<@(unittests_sources)',
       ],
       'conditions': [
         ['v8_target_arch=="arm"', {
           'sources': [
@@ skipping 70 matching lines @@
             '../../gypfiles/isolate.gypi',
           ],
           'sources': [
             'unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }