Run input_method_bridge_unittest on Mac, remove unused DummyInputMethodDelegate

ui/base/ime/dummy_input_method_delegate.cc

Index: ui/base/ime/dummy_input_method_delegate.cc
diff --git a/ui/base/ime/dummy_input_method_delegate.cc b/ui/base/ime/dummy_input_method_delegate.cc
deleted file mode 100644
index 473884a65ae916cfa09b9be328465f3838789b23..0000000000000000000000000000000000000000
--- a/ui/base/ime/dummy_input_method_delegate.cc
+++ /dev/null
@@ -1,19 +0,0 @@
-// Copyright 2013 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.
-
-#include "ui/base/ime/dummy_input_method_delegate.h"
-
-namespace ui {
-namespace internal {
-
-DummyInputMethodDelegate::DummyInputMethodDelegate() {}
-DummyInputMethodDelegate::~DummyInputMethodDelegate() {}
-
-bool DummyInputMethodDelegate::DispatchKeyEventPostIME(
-    const ui::KeyEvent& key_event) {
-  return true;
-}
-
-}  // namespace internal
-}  // namespace ui