[Media Router] Reland of "Media Router GYP/GN cleanup".

chrome/browser/media/router/media_router.gypi

Index: chrome/browser/media/router/media_router.gypi
diff --git a/chrome/browser/media/router/media_router.gypi b/chrome/browser/media/router/media_router.gypi
new file mode 100644
index 0000000000000000000000000000000000000000..32bce7122a7222bb8a4e102bed4e49c568093051
--- /dev/null
+++ b/chrome/browser/media/router/media_router.gypi
@@ -0,0 +1,44 @@
+# Copyright (c) 2015 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': {
+    # File lists shared with GN build.
+    'media_router_sources': [
+      'create_session_request.cc',
+      'create_session_request.h',
+      'issue.cc',
+      'issue.h',
+      'issue_manager.cc',
+      'issue_manager.h',
+      'issues_observer.h',
+      'media_route.cc',
+      'media_route.h',
+      'media_route_id.h',
+      'media_router.h',
+      'media_router_type_converters.cc',
+      'media_router_type_converters.h',
+      'media_routes_observer.cc',
+      'media_routes_observer.h',
+      'media_sink.cc',
+      'media_sink.h',
+      'media_sinks_observer.cc',
+      'media_sinks_observer.h',
+      'media_source.cc',
+      'media_source.h',
+      'media_source_helper.cc',
+      'media_source_helper.h',
+      'presentation_media_sinks_observer.cc',
+      'presentation_media_sinks_observer.h',
+      'route_id_manager.cc',
+      'route_id_manager.h',
+    ],
+    'media_router_test_support_sources': [
+      'mock_media_router.cc',
+      'mock_media_router.h',
+      'mock_screen_availability_listener.cc',
+      'mock_screen_availability_listener.h',
+    ],
+  },
+}