Sync more GN unit tests with GYP.

components/enhanced_bookmarks/BUILD.gn

 # Copyright 2014 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.
 
 if (is_android) {
   import("//build/config/android/config.gni")
   import("//build/config/android/rules.gni")
 }
 
 # GYP: //components/enhanced_bookmarks.gypi:enhanced_bookmarks
@@ skipping 61 matching lines @@
 }
 
 # GYP: //components/enhanced_bookmarks.gypi:enhanced_bookmarks_test_support
 source_set("test_support") {
   testonly = true
   sources = [
     "test_image_store.cc",
     "test_image_store.h",
   ]
 
-  deps = [
+  public_deps = [
     ":enhanced_bookmarks",
     "//skia",
     "//testing/gtest",
   ]
 }
+
+source_set("unit_tests") {
+  testonly = true
+  sources = [
+    "enhanced_bookmark_model_unittest.cc",
+    "image_store_ios_unittest.mm",
+    "image_store_unittest.cc",
+    "item_position_unittest.cc",
+  ]
+  deps = [
+    ":test_support",
+    "//components/enhanced_bookmarks/proto",
+  ]
+}