Componentize TestToolbarModel

components/toolbar.gypi

 # Copyright 2015 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': [
     {
       # GN version: //components/toolbar
       'target_name': 'toolbar',
       'type': 'static_library',
       'dependencies': [
         '../base/base.gyp:base',
         '../url/url.gyp:url_lib',
         'security_state',
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
         # Note: sources list duplicated in GN build.
         'toolbar/toolbar_model.cc',
         'toolbar/toolbar_model.h',
       ],
     },
+    {
+      # GN version: //components/toolbar:test_support
+      'target_name': 'toolbar_test_support',
+      'type': 'static_library',
+      'dependencies': [
+        '../base/base.gyp:base',
+        '../ui/gfx/gfx.gyp:gfx',
+        'components_resources.gyp:components_resources',
+        'toolbar',
+      ],
+      'include_dirs': [
+        '..',
+      ],
+      'sources': [
+        'toolbar/test_toolbar_model.cc',
+        'toolbar/test_toolbar_model.h',
+      ],
+    },
   ],
 }