[Media Router] Add DialMediaSinkService and DeviceDescriptionService

chrome/browser/media/router/BUILD.gn

Index: chrome/browser/media/router/BUILD.gn
diff --git a/chrome/browser/media/router/BUILD.gn b/chrome/browser/media/router/BUILD.gn
index 5dfed20eb9594b77473d6645de62d221beac5cba..7c45cadc45c52ab8dab7a064552cdb6070fe2dc0 100644
--- a/chrome/browser/media/router/BUILD.gn
+++ b/chrome/browser/media/router/BUILD.gn
@@ -15,6 +15,7 @@ static_library("router") {
     "//content/public/browser",
     "//content/public/common",
     "//third_party/icu",
+    "//third_party/libxml",

[mark a. foltz, 2017/03/11 00:08:15]

Per our chat, I think we'll have to wait until there is a utility process
available to do XML parsing.  

[zhaobin, 2017/03/28 13:36:59]

Done.

     "//url",
   ]
   sources = [
@@ -22,6 +23,12 @@ static_library("router") {
     "browser_presentation_connection_proxy.h",
     "create_presentation_connection_request.cc",
     "create_presentation_connection_request.h",
+    "device_description_service.cc",
+    "device_description_service.h",
+    "dial_media_sink_cache_service.cc",
+    "dial_media_sink_cache_service.h",
+    "dial_media_sink_service.cc",
+    "dial_media_sink_service.h",
     "discovery/media_sink_internal.cc",
     "discovery/media_sink_internal.h",
     "issue.cc",
@@ -129,6 +136,8 @@ static_library("test_support") {
     "//testing/gmock",
   ]
   sources = [
+    "mock_device_description_service.cc",
+    "mock_device_description_service.h",
     "mock_media_router.cc",
     "mock_media_router.h",
     "mock_screen_availability_listener.cc",