plugin_tests should depend on the chrome target since it launches the browser...

chrome/chrome_tests.gypi

 # Copyright (c) 2010 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.
 
 {
   'variables' : {
     'browser_tests_sources_views_specific': [
       'browser/extensions/browser_action_test_util_views.cc',
       'browser/views/browser_actions_container_browsertest.cc',
     ],
@@ skipping 1073 matching lines @@
             'chrome',
             '../third_party/ocmock/ocmock.gyp:ocmock',
           ],
           'include_dirs': [
             '../third_party/GTM',
             '../third_party/GTM/AppKit',
           ],
           'sources!': [
             # Blocked on bookmark manager.
             'browser/bookmarks/bookmark_context_menu_controller_unittest.cc',
-            'browser/views/accessibility_event_router_views_unittest.cc',   
+            'browser/views/accessibility_event_router_views_unittest.cc',
             'browser/views/bookmark_context_menu_test.cc',
             'browser/gtk/go_button_gtk_unittest.cc',
             'browser/gtk/tabs/tab_renderer_gtk_unittest.cc',
             'tools/convert_dict/convert_dict_unittest.cc',
             '../third_party/hunspell/google/hunspell_tests.cc',
           ],
           # TODO(mark): We really want this for all non-static library targets,
           # but when we tried to pull it up to the common.gypi level, it broke
           # other things like the ui, startup, and page_cycler tests. *shrug*
           'xcode_settings': {'OTHER_LDFLAGS': ['-Wl,-ObjC']},
@@ skipping 758 matching lines @@
             },
           },
         }],
       ],
     },
     {
       'target_name': 'plugin_tests',
       'type': 'executable',
       'msvs_guid': 'A1CAA831-C507-4B2E-87F3-AEC63C9907F9',
       'dependencies': [
+        'chrome',
         'chrome_resources',
         'chrome_strings',
         'test_support_common',
         'test_support_ui',
         '../skia/skia.gyp:skia',
         '../testing/gtest.gyp:gtest',
         '../third_party/libxml/libxml.gyp:libxml',
         '../third_party/libxslt/libxslt.gyp:libxslt',
         '../third_party/npapi/npapi.gyp:npapi',
       ],
@@ skipping 350 matching lines @@
       ]
     }],  # 'coverage!=0'
   ],  # 'conditions'
 }
 
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