Add isolate for content_browsertests with --site-per-process.

content/content_tests.gypi

 # Copyright (c) 2013 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.
 
 {
   'variables': {
     'layouttest_support_content_sources': [
       'public/test/layouttest_support.h',
       'public/test/nested_message_pump_android.cc',
       'public/test/nested_message_pump_android.h',
@@ skipping 1581 matching lines @@
             }],
             ['enable_web_speech == 1', {
               'sources': [ '<@(content_browsertests_speech_sources)' ],
             }],
             ['branding != "Chrome"', {
               'sources': [ '<@(content_browsertests_unofficial_build_sources)' ],
             }],
           ],
         },
         {
+          # GN: //content/test:content_site_isolation_browsertests_run
+          'target_name': 'content_site_isolation_browsertests_run',
+          'type': 'none',
+          'dependencies': [
+            'content_browsertests_run',

[M-A Ruel, 2016/01/22 18:52:29]

'content_browsertests',
?

+          ],
+          'sources': [
+            'content_site_isolation_browsertests.isolate',
+          ],
+        },
+        {
           # GN version: //content/test:content_gl_tests
           'target_name': 'content_gl_tests',
           'type': '<(gtest_target_type)',
           'dependencies': [
             'content.gyp:content_common',
             'test_support_content',
             '../base/base.gyp:test_support_base',
             '../gpu/gpu.gyp:command_buffer_common',
             '../testing/gtest.gyp:gtest',
             '../third_party/WebKit/public/blink.gyp:blink',
@@ skipping 604 matching lines @@
                   'content_unittests_apk.isolate',
                 ],
               },
             ],
           },
         ],
       ],
     }],
   ],
 }