Add chrome://usb-internals page for adding and removing test devices.

chrome/browser/ui/webui/usb_internals/BUILD.gn

Index: chrome/browser/ui/webui/usb_internals/BUILD.gn
diff --git a/mash/init/public/interfaces/BUILD.gn b/chrome/browser/ui/webui/usb_internals/BUILD.gn
similarity index 76%
copy from mash/init/public/interfaces/BUILD.gn
copy to chrome/browser/ui/webui/usb_internals/BUILD.gn
index 21905185a8f524baaab39a09c8b8222ff339bff1..b7a4027a380d0422e954b17ac27454d404254047 100644
--- a/mash/init/public/interfaces/BUILD.gn
+++ b/chrome/browser/ui/webui/usb_internals/BUILD.gn
@@ -4,10 +4,8 @@
 
 import("//mojo/public/tools/bindings/mojom.gni")
 
-mojom("interfaces") {
+mojom("mojo_bindings") {
   sources = [
-    "init.mojom",
+    "usb_internals.mojom",
   ]
-
-  use_new_wrapper_types = false
 }