[Translate] Migrate IPCs to Mojo interfaces.

components/translate/content/public/interfaces/BUILD.gn

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//mojo/public/tools/bindings/mojom.gni")
 
 mojom("interfaces") {
   sources = [
-    "credential_manager.mojom",
+    "translate.mojom",
   ]
 
   public_deps = [
+    "//mojo/common:common_custom_types",
     "//url/mojo:url_mojom_gurl",
-    "//url/mojo:url_mojom_origin",
   ]
-
-  use_new_wrapper_types = false
 }