[Media Router] Parse device description xml in utility process

chrome/common/BUILD.gn

Index: chrome/common/BUILD.gn
diff --git a/chrome/common/BUILD.gn b/chrome/common/BUILD.gn
index 8ce80438680e790362357b50a8e809d8c11d7ae5..6a18c8c256846e1f87143948564abeadc4391e76 100644
--- a/chrome/common/BUILD.gn
+++ b/chrome/common/BUILD.gn
@@ -538,6 +538,14 @@ static_library("common") {
     ]
     public_deps += [ "//chrome/common:version_header" ]
   }
+
+  if (enable_media_router) {
+    sources += [
+      "media_router/dial_device_description.cc",
+      "media_router/dial_device_description.h",
+    ]
+    public_deps += [ "//chrome/common/media_router:interfaces" ]
+  }
 }
 
 process_version("version_header") {