Remove content/public/plugin and chrome/plugin

chrome/chrome_tests_unit.gypi

 # Copyright 2012 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': {
     'chrome_unit_tests_sources': [
       # histograms.xml is analyzed by AboutFlagsHistogramTest, so this
       # dependency is needed to make commit bots run unit_tests on
       # histograms.xml changes.
       '../tools/metrics/histograms/histograms.xml',
@@ skipping 1840 matching lines @@
         'test/logging/win/log_file_reader.h',
         'test/logging/win/mof_data_parser.cc',
         'test/logging/win/mof_data_parser.h',
         'test/logging/win/test_log_collector.cc',
         'test/logging/win/test_log_collector.h',
       ],
       'conditions': [
         ['OS!="ios"', {
           'dependencies': [
             'child',
-            'plugin',
             'renderer',
             'utility',
             '../content/content.gyp:content_gpu',
             '../content/content.gyp:content_ppapi_plugin',
             '../content/content.gyp:content_renderer',
             '../content/content.gyp:content_utility',
             '../components/components.gyp:autofill_core_test_support',
             '../components/components.gyp:captive_portal_test_support',
             '../components/components.gyp:gcm_driver_crypto_test_support',
             '../components/components.gyp:rappor_test_support',
@@ skipping 1125 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }