NoTransportImageTransportFactory is compiled into only test targets.

content/content_browser.gypi

 # Copyright (c) 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.
 
 {
   'dependencies': [
     '../base/base.gyp:base_static',
     '../crypto/crypto.gyp:crypto',
     '../google_apis/google_apis.gyp:google_apis',
     '../net/net.gyp:net',
@@ skipping 1380 matching lines @@
       'browser/compositor/browser_compositor_view_mac.mm',
       'browser/compositor/browser_compositor_view_mac.h',
       'browser/compositor/browser_compositor_view_private_mac.mm',
       'browser/compositor/browser_compositor_view_private_mac.h',
       'browser/compositor/delegated_frame_host.cc',
       'browser/compositor/delegated_frame_host.h',
       'browser/compositor/gpu_process_transport_factory.cc',
       'browser/compositor/gpu_process_transport_factory.h',
       'browser/compositor/image_transport_factory.cc',
       'browser/compositor/image_transport_factory.h',
-      'browser/compositor/no_transport_image_transport_factory.cc',
-      'browser/compositor/no_transport_image_transport_factory.h',
       'browser/compositor/onscreen_display_client.cc',
       'browser/compositor/onscreen_display_client.h',
       'browser/compositor/overlay_candidate_validator_ozone.cc',
       'browser/compositor/overlay_candidate_validator_ozone.h',
       'browser/compositor/owned_mailbox.h',
       'browser/compositor/owned_mailbox.cc',
       'browser/compositor/reflector_impl.cc',
       'browser/compositor/reflector_impl.h',
       'browser/compositor/resize_lock.cc',
       'browser/compositor/resize_lock.h',
@@ skipping 430 matching lines @@
       'sources': [
         'browser/media/cdm/browser_cdm_manager.cc',
         'browser/media/cdm/browser_cdm_manager.h',
         # This works on Android because enable_browser_cdms==1 on Android.
         'browser/media/media_web_contents_observer.cc',
         'browser/media/media_web_contents_observer.h',
       ],
     }],
   ],
 }