Port ChromeSyncShell build rules to GN

sync/sync_tests.gypi

 # Copyright 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.
 
 {
   'targets': [
     # Test support files for the 'sync_core' target.
     # GN version: //sync:test_support_sync_core
     {
       'target_name': 'test_support_sync_core',
@@ skipping 421 matching lines @@
           'sources': [
             '../chrome/android/sync_shell/javatests/src/org/chromium/chrome/browser/sync/FakeServerHelper.java',
           ],
           'variables': {
             'jni_gen_package': 'sync/test/fake_server',
             'jni_generator_ptr_type': 'long',
           },
           'includes': [ '../build/jni_generator.gypi' ],
         },
         {
-          # TODO(pvalenzuela): Create GN version of this target.
-          # http://crbug.com/475612
+          # GN: //sync:test_support_sync_proto_java
           'target_name': 'test_support_sync_proto_java',
           'type': 'none',
           'variables': {
             'proto_in_dir': '<(INTERMEDIATE_DIR)/sync_protos',
             # Set this variable so that sync_proto_source_paths refers to the
             # temporary proto definitions created here.
             'sync_proto_sources_dir': '<(INTERMEDIATE_DIR)/sync_protos',
           },
           'actions': [
             {
@@ skipping 85 matching lines @@
             '../build/isolate.gypi',
           ],
           'sources': [
             'sync_unit_tests.isolate',
           ],
         },
       ],
     }],
   ],
 }