Add media router common classes and unittests.

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': [
       '../components/autofill/content/renderer/test_password_autofill_agent.cc',
       '../components/autofill/content/renderer/test_password_autofill_agent.h',
       '../components/autofill/content/renderer/test_password_generation_agent.cc',
       '../components/autofill/content/renderer/test_password_generation_agent.h',
@@ skipping 2300 matching lines @@
         }],
         ['enable_autofill_dialog==1 and OS!="android"', {
           'sources': [ '<@(chrome_unit_tests_autofill_dialog_sources)' ],
         }],
         ['enable_plugins==1', {
           'sources': [ '<@(chrome_unit_tests_plugins_sources)' ],
         }],
         ['enable_print_preview==1', {
           'sources': [ '<@(chrome_unit_tests_print_preview_sources)' ],
         }],
+        ['enable_media_router==1', {
+          'sources': [
+            'browser/media/router/media_controller_impl_unittest.cc',
+            'browser/media/router/media_route_unittest.cc',
+            'browser/media/router/media_sink_unittest.cc',
+            'browser/media/router/media_source_unittest.cc',
+          ],
+        }],
         ['enable_captive_portal_detection==1', {
           'sources': [ '<@(chrome_unit_tests_captive_portal_sources)' ],
         }],
         ['enable_session_service==1', {
           'sources': [ '<@(chrome_unit_tests_session_service_sources)' ],
         }],
         ['enable_webrtc==1', {
           'sources': [ '<@(chrome_unit_tests_webrtc_sources)' ],
         }],
         ['chromeos==1', {
@@ skipping 409 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }