Extract a minimal subset of WebDialogUI/WebDialogDelegate from src/chrome -> src/ui/web_dialogs

chrome/browser/ui/views/web_dialog_view_browsertest.cc

 // Copyright (c) 2012 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 "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/file_path.h"
 #include "base/memory/singleton.h"
 #include "base/message_loop.h"
 #include "base/utf_string_conversions.h"
@@ skipping 168 matching lines @@
 
   view->MoveContents(web_contents, set_bounds);
   ui_test_utils::RunMessageLoop();  // TestWebDialogView will quit.
   actual_bounds = view->GetWidget()->GetClientAreaScreenBounds();
   EXPECT_LT(0, actual_bounds.width());
   EXPECT_LT(0, actual_bounds.height());
 }
 
 // This is timing out about 5~10% of runs. See crbug.com/86059.
 IN_PROC_BROWSER_TEST_F(WebDialogBrowserTest, DISABLED_WebContentRendered) {
-  WebDialogDelegate* delegate = new test::TestWebDialogDelegate(
+  web_dialogs::WebDialogDelegate* delegate = new test::TestWebDialogDelegate(
       GURL(chrome::kChromeUIChromeURLsURL));
 
   TestWebDialogView* view =
       new TestWebDialogView(browser()->profile(), browser(), delegate);
   WebContents* web_contents = browser()->GetSelectedWebContents();
   ASSERT_TRUE(web_contents != NULL);
   views::Widget::CreateWindowWithParent(
       view, web_contents->GetView()->GetTopLevelNativeWindow());
   EXPECT_TRUE(view->initialized_);
 
   view->InitDialog();
   view->GetWidget()->Show();
 
   // TestWebDialogView::OnTabMainFrameRender() will Quit().
   MessageLoopForUI::current()->Run();
 
   EXPECT_TRUE(view->painted());
 
   view->GetWidget()->Close();
 }