IME for Mus: Make InputMethodMus use the IME Mojo API.

services/ui/ime/test_ime_driver/main.cc

Index: services/ui/ime/test_ime_driver/main.cc
diff --git a/services/ui/ime/test_ime_driver/main.cc b/services/ui/ime/test_ime_driver/main.cc
index 795119fae475224c2aec838161eb6557c8a38013..9bed1aa5c038cb25f82587589c56a13e67dfb6ff 100644
--- a/services/ui/ime/test_ime_driver/main.cc
+++ b/services/ui/ime/test_ime_driver/main.cc
@@ -18,6 +18,10 @@ class TestIME : public shell::Service {
 
  private:
   // shell::Service:
+  bool OnConnect(const shell::Identity& remote_identity,
+                 shell::InterfaceRegistry* registry) override {
+    return true;
+  }
   void OnStart(const shell::Identity& identity) override {
     mojom::IMEDriverPtr ime_driver_ptr;
     new TestIMEDriver(GetProxy(&ime_driver_ptr));