Put more files under the enable_service_discovery build flag.

chrome/chrome_debugger.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': [
     {
       # GN version: //chrome/browser/devtools
       'target_name': 'debugger',
       'type': 'static_library',
@@ skipping 47 matching lines @@
             'chrome_resources.gyp:chrome_resources',
             'chrome_resources.gyp:chrome_strings',
             'chrome_resources.gyp:theme_resources',
             'common/extensions/api/api.gyp:chrome_api',
           ],
           'sources': [
             'browser/devtools/chrome_devtools_discovery_provider.cc',
             'browser/devtools/chrome_devtools_discovery_provider.h',
             'browser/devtools/device/adb/adb_client_socket.cc',
             'browser/devtools/device/adb/adb_client_socket.h',
-            'browser/devtools/device/cast_device_provider.cc',
-            'browser/devtools/device/cast_device_provider.h',
             'browser/devtools/device/adb/adb_device_provider.cc',
             'browser/devtools/device/adb/adb_device_provider.h',
             'browser/devtools/device/android_device_info_query.cc',
             'browser/devtools/device/android_device_manager.cc',
             'browser/devtools/device/android_device_manager.h',
             'browser/devtools/device/android_web_socket.cc',
             'browser/devtools/device/devtools_android_bridge.cc',
             'browser/devtools/device/devtools_android_bridge.h',
             'browser/devtools/device/port_forwarding_controller.cc',
             'browser/devtools/device/port_forwarding_controller.h',
@@ skipping 25 matching lines @@
             'browser/devtools/devtools_toggle_action.h',
             'browser/devtools/devtools_ui_bindings.cc',
             'browser/devtools/devtools_ui_bindings.h',
             'browser/devtools/devtools_window.cc',
             'browser/devtools/devtools_window.h',
             'browser/devtools/global_confirm_info_bar.cc',
             'browser/devtools/global_confirm_info_bar.h',
             'browser/devtools/remote_debugging_server.cc',
             'browser/devtools/remote_debugging_server.h',
           ],
+          'conditions': [
+            ['enable_service_discovery==1', {
+              'sources': [
+                'browser/devtools/device/cast_device_provider.cc',
+                'browser/devtools/device/cast_device_provider.h',
+                'browser/devtools/device/webrtc/devtools_bridge_client.cc',
+                'browser/devtools/device/webrtc/devtools_bridge_client.h',
+                'browser/devtools/device/webrtc/devtools_bridge_instances_request.cc',
+                'browser/devtools/device/webrtc/devtools_bridge_instances_request.h',
+                'browser/devtools/device/webrtc/send_command_request.cc',
+                'browser/devtools/device/webrtc/send_command_request.h',
+                'browser/devtools/device/webrtc/webrtc_device_provider.cc',
+                'browser/devtools/device/webrtc/webrtc_device_provider.h',
+              ],
+            }],
+          ],
+
         }], # OS!="android"
         ['debug_devtools==1', {
           'defines': [
             'DEBUG_DEVTOOLS=1',
            ],
         }],
       ],
       # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
       'msvs_disabled_warnings': [ 4267, ],
     },
   ],
 }