[Media Router] Add MediaSink subtypes

chrome/browser/media/router/mojo/media_router.typemap

Index: chrome/browser/media/router/mojo/media_router.typemap
diff --git a/chrome/browser/media/router/mojo/media_router.typemap b/chrome/browser/media/router/mojo/media_router.typemap
index e4e6bafb36d09b61b22b788e9f672a02843493f3..e70b011ebb8a70603d80ef03ba9476c48e9ffc1e 100644
--- a/chrome/browser/media/router/mojo/media_router.typemap
+++ b/chrome/browser/media/router/mojo/media_router.typemap
@@ -9,6 +9,7 @@ public_headers = [
 ]
 deps = [
   "//third_party/icu",  # For issue.h
+  "//url",
 ]
 traits_headers =
     [ "//chrome/browser/media/router/mojo/media_router_struct_traits.h" ]
@@ -20,4 +21,5 @@ type_mappings = [
   "media_router.mojom.Issue.ActionType=media_router::IssueInfo::Action",
   "media_router.mojom.Issue.Severity=media_router::IssueInfo::Severity",
   "media_router.mojom.RouteMessage=media_router::RouteMessage",
+  "media_router.mojom.MediaSink=std::unique_ptr<media_router::MediaSink>[move_only,nullable_is_same_type]",

[dcheng, 2017/02/05 09:23:00]

Is nullable_is_same_type required here? Is there an instance where we want to
send nullable MediaSinks?

[zhaobin, 2017/02/06 19:37:10]

Done.

 ]