Replace forward_dependent_configs with public_deps

sync/BUILD.gn

Index: sync/BUILD.gn
diff --git a/sync/BUILD.gn b/sync/BUILD.gn
index 948f18a9d4512ff481e170f5858b48ce8764a41e..d5cae95e0ef3f0227717a9e21cc87a37c5fe72d6 100644
--- a/sync/BUILD.gn
+++ b/sync/BUILD.gn
@@ -472,7 +472,7 @@ static_library("test_support_sync_core") {
     "util/test_unrecoverable_error_handler.h",
   ]
 
-  deps = [
+  public_deps = [
     "//base",
     "//testing/gmock",
     "//testing/gtest",
@@ -481,12 +481,6 @@ static_library("test_support_sync_core") {
 
   defines = [ "SYNC_TEST" ]
   configs += [ "//build/config/compiler:wexit_time_destructors" ]
-
-  forward_dependent_configs_from = [
-    "//testing/gmock",
-    "//testing/gtest",
-    "//sync"
-  ]
 }
 
 # GYP version: sync/sync_tests.gypi:test_support_sync_internal_api
@@ -509,7 +503,7 @@ static_library("test_support_sync_internal_api") {
     "internal_api/test/test_user_share.cc",
   ]
 
-  deps = [
+  public_deps = [
     "//base",
     "//testing/gtest",
     "//sync",
@@ -518,12 +512,6 @@ static_library("test_support_sync_internal_api") {
 
   defines = [ "SYNC_TEST" ]
   configs += [ "//build/config/compiler:wexit_time_destructors" ]
-
-  forward_dependent_configs_from = [
-    "//testing/gtest",
-    "//sync",
-    ":test_support_sync_core",
-  ]
 }
 
 # GYP version: sync/sync_tests.gypi:test_support_sync_api
@@ -540,14 +528,9 @@ static_library("test_support_sync_api") {
     "api/sync_error_factory_mock.h",
   ]
 
-  deps = [
-    "//testing/gmock",
-    "//sync",
-  ]
-
   defines = [ "SYNC_TEST" ]
 
-  forward_dependent_configs_from = [
+  public_deps = [
     "//testing/gmock",
     "//sync",
   ]
@@ -720,16 +703,16 @@ static_library("test_support_sync_testserver") {
 
   configs += [ "//build/config/compiler:wexit_time_destructors" ]
 
-  deps = [
+  public_deps = [
     "//base",
     "//net:test_support",
+  ]
+  deps = [
     ":sync",
 
     # The sync test server uses Python modules generated by the sync protos.
     #  '../third_party/protobuf/protobuf.gyp:py_proto',  # TODO(GYP)
   ]
-
-  forward_dependent_configs_from = [ "//base", "//net:test_support" ]
 }
 
 # GYP version: sync/sync_tests.gypi:test_support_accounts_client