Upstreaming review for Media Router Mojo interface.

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 746eaa9e3ea1baedd0e2c87c23ef6e79b67cb0e0..1150886ab961e29c4ef10e6437ddd3373bc9e29f 100644
--- a/chrome/browser/media/router/BUILD.gn
+++ b/chrome/browser/media/router/BUILD.gn
@@ -3,6 +3,7 @@
 # found in the LICENSE file.
 #
 import("//testing/test.gni")
+import("//third_party/mojo/src/mojo/public/tools/bindings/mojom.gni")
 
 source_set("router") {
   deps = [
@@ -66,6 +67,12 @@ source_set("unit_tests") {
   ]
 }
 
+mojom("mojo_bindings") {
+  sources = [
+    "media_router.mojom",
+  ]
+}
+
 # Optional standalone test binary, for faster isolated builds.
 test("unit_tests_main") {
   deps = [