Media Remoting: Add mojo interfaces between browser and extension.

media/mojo/interfaces/BUILD.gn

Index: media/mojo/interfaces/BUILD.gn
diff --git a/media/mojo/interfaces/BUILD.gn b/media/mojo/interfaces/BUILD.gn
index 88e8bcb535ed7b2807776b853bc05609ef2d1f45..a81becbb06fe9e0df806f3bcdd9b9800f9d5cbac 100644
--- a/media/mojo/interfaces/BUILD.gn
+++ b/media/mojo/interfaces/BUILD.gn
@@ -46,10 +46,36 @@ mojom("interfaces") {
   use_once_callback = false
 }
 
+mojom("remoting_common") {
+  sources = [
+    "remoting_common.mojom",
+  ]
+
+  # TODO(crbug.com/699569): Convert to use the new JS bindings.
+  use_new_js_bindings = false
+}
+
+mojom("mirror_service_remoting") {
+  sources = [
+    "mirror_service_remoting.mojom",
+  ]
+
+  public_deps = [
+    ":remoting_common",
+  ]
+
+  # TODO(crbug.com/699569): Convert to use the new JS bindings.
+  use_new_js_bindings = false
+}
+
 mojom("remoting") {
   sources = [
     "remoting.mojom",
   ]
+
+  public_deps = [
+    ":remoting_common",
+  ]
 }
 
 mojom("test_interfaces") {