Revert of Sync more GN unit tests with GYP.

components/web_modal/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.
 
 static_library("web_modal") {
   sources = [
     "modal_dialog_host.cc",
     "modal_dialog_host.h",
     "single_web_contents_dialog_manager.h",
     "web_contents_modal_dialog_host.cc",
     "web_contents_modal_dialog_host.h",
     "web_contents_modal_dialog_manager.cc",
     "web_contents_modal_dialog_manager.h",
     "web_contents_modal_dialog_manager_delegate.cc",
     "web_contents_modal_dialog_manager_delegate.h",
   ]
 
   deps = [
     "//base",
     "//content/public/browser",
     "//net",
     "//skia",
     "//ui/gfx",
     "//ui/gfx/geometry",
   ]
 }
 
 static_library("test_support") {
-  testonly = true
   sources = [
     "test_web_contents_modal_dialog_host.cc",
     "test_web_contents_modal_dialog_host.h",
     "test_web_contents_modal_dialog_manager_delegate.cc",
     "test_web_contents_modal_dialog_manager_delegate.h",
   ]
 
-  public_deps = [
+  deps = [
     ":web_modal",
-  ]
-  deps = [
     "//base",
     "//ui/gfx",
     "//ui/gfx/geometry",
   ]
 }