Run input_method_bridge_unittest on Mac, remove unused DummyInputMethodDelegate

ui/views/ime/input_method_bridge_unittest.cc

 // 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/aura/window.h"
-#include "ui/base/ime/dummy_input_method_delegate.h"
-#include "ui/base/ime/input_method_minimal.h"
-#include "ui/base/ime/text_input_client.h"
 #include "ui/views/ime/input_method.h"
-#include "ui/views/test/views_test_base.h"
-#include "ui/views/widget/desktop_aura/desktop_native_widget_aura.h"
-#include "ui/views/widget/native_widget_aura.h"
+#include "ui/views/test/widget_test.h"
 #include "ui/views/widget/widget.h"
 
 namespace views {
 
-typedef ViewsTestBase InputMethodBridgeTest;
+using InputMethodBridgeTest = test::WidgetTest;
 
 TEST_F(InputMethodBridgeTest, DestructTest) {
-  ui::internal::DummyInputMethodDelegate input_method_delegate;
-  ui::InputMethodMinimal input_method(&input_method_delegate);

[tapted, 2015/06/24 05:24:22]

http://crrev.com/333698 removed a line below this that did 

  GetContext()->SetProperty(aura::client::kRootWindowInputMethodKey,	
                            static_cast<ui::InputMethod*>(&input_method));

with that gone, input_method (and the DummyInputMethodDelegate), are not used,
so I've removed them. Added a comment below about where things are owned.

There were no other users of DummyInputMethodDelegate.

-
-  Widget* toplevel = new Widget;
-  Widget::InitParams toplevel_params =
-      CreateParams(Widget::InitParams::TYPE_WINDOW);
-  // |child| owns |native_widget|.
-  toplevel_params.native_widget = new DesktopNativeWidgetAura(toplevel);
-  toplevel->Init(toplevel_params);
+  Widget* toplevel = CreateNativeDesktopWidget();
 
   Widget* child = new Widget;
   Widget::InitParams child_params =
       CreateParams(Widget::InitParams::TYPE_POPUP);
   child_params.parent = toplevel->GetNativeView();
   // |child| owns |native_widget|.
-  child_params.native_widget = new NativeWidgetAura(child);
+  child_params.native_widget = new PlatformNativeWidget(child);
   child->Init(child_params);
 
+  // Both the views::InputMethod and the "host" ui::InputMethod are created
+  // lazily. Requesting the views::InputMethod (owned by Widget) will also
+  // create the ui::InputMethod (owned by NativeWidget) to build the bridge.
+  EXPECT_TRUE(child->GetInputMethod());
   child->GetInputMethod()->OnFocus();
 
+  EXPECT_TRUE(toplevel->GetInputMethod());
+  toplevel->GetInputMethod()->OnFocus();
+
   toplevel->CloseNow();
 }
 
 }  // namespace views