Revert of Remove NPAPI plugin from chromoting webapp.

remoting/remoting_client.gypi

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'remoting_client_plugin',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 90 matching lines @@
           ],
         }],
       ],
     },  # end of target 'remoting_webapp'
 
     {
       'target_name': 'remoting_webapp_v1',
       'type': 'none',
       'variables': {
         'webapp_type': 'v1',
+        'include_host_plugin': '<(enable_remoting_host)',
         'output_dir': '<(PRODUCT_DIR)/remoting/remoting.webapp',
         'zip_path': '<(PRODUCT_DIR)/remoting-webapp.zip',
       },
       'includes': [ 'remoting_webapp.gypi', ],
     },  # end of target 'remoting_webapp_v1'
 
     {
       'target_name': 'remoting_webapp_v2',
       'type': 'none',
       'variables': {
@@ skipping 18 matching lines @@
             'extra_files': [ 'webapp/background.js' ],
             'webapp_type': 'v2_pnacl',
           },
           'includes': [ 'remoting_webapp.gypi', ],
         },  # end of target 'remoting_webapp_pnacl'
       ],
     }],
   ],
 
 }