[Media Router] Convert to use typemaps for media_router.mojom.

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..de2b10cb2cbdb14cf015e26fb0ed58e0d97dca7b 100644
--- a/chrome/browser/media/router/mojo/media_router.typemap
+++ b/chrome/browser/media/router/mojo/media_router.typemap
@@ -5,7 +5,11 @@
 mojom = "//chrome/browser/media/router/mojo/media_router.mojom"
 public_headers = [
   "//chrome/browser/media/router/issue.h",
+  "//chrome/browser/media/router/media_route.h",
+  "//chrome/browser/media/router/media_sink.h",
   "//chrome/browser/media/router/route_message.h",
+  "//chrome/browser/media/router/route_request_result.h",
+  "//content/public/common/presentation_session.h",
 ]
 deps = [
   "//third_party/icu",  # For issue.h
@@ -19,5 +23,10 @@ type_mappings = [
   "media_router.mojom.Issue=media_router::IssueInfo",
   "media_router.mojom.Issue.ActionType=media_router::IssueInfo::Action",
   "media_router.mojom.Issue.Severity=media_router::IssueInfo::Severity",
+  "media_router.mojom.MediaRoute=media_router::MediaRoute",
+  "media_router.mojom.MediaRouter.PresentationConnectionCloseReason=content::PresentationConnectionCloseReason",
+  "media_router.mojom.MediaRouter.PresentationConnectionState=content::PresentationConnectionState",
+  "media_router.mojom.MediaSink=media_router::MediaSink",
   "media_router.mojom.RouteMessage=media_router::RouteMessage",
+  "media_router.mojom.RouteRequestResultCode=media_router::RouteRequestResult::ResultCode",
 ]