Delete the NPAPI plugin browsertests.

chrome/interactive_ui_tests.isolate

 # Copyright 2013 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.
 {
   'conditions': [
     ['use_x11==0', {
       'variables': {
         'command': [
           '../testing/test_env.py',
           '<(PRODUCT_DIR)/interactive_ui_tests<(EXECUTABLE_SUFFIX)',
@@ skipping 82 matching lines @@
       },
     }],
     ['OS=="win"', {
       'variables': {
         'files': [
           '<(PRODUCT_DIR)/chrome_elf.dll',
           '<(PRODUCT_DIR)/d3dcompiler_47.dll',
           '<(PRODUCT_DIR)/libEGL.dll',
           '<(PRODUCT_DIR)/libGLESv2.dll',
           '<(PRODUCT_DIR)/osmesa.dll',
-          '<(PRODUCT_DIR)/plugins/npapi_test_plugin.dll',
           '<(PRODUCT_DIR)/ppapi_tests.dll',
         ],
       },
     }],
     ['OS=="win" and target_arch=="ia32"', {
       'variables': {
         'files': [
           '<(PRODUCT_DIR)/wow_helper.exe',
         ],
       },
@@ skipping 24 matching lines @@
           'browser/chromeos/login/test/https_forwarder.py',
         ],
       },
     }],
   ],
   'includes': [
     '../base/base.isolate',
     '../gin/v8.isolate',
   ],
 }