Backfill some UI tests.

ui/views/window/dialog_delegate_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 <stddef.h>
 
 #include "base/macros.h"
 #include "base/strings/utf_string_conversions.h"
 #include "ui/base/hit_test.h"
 #include "ui/events/event_processor.h"
@@ skipping 271 matching lines @@
     { 1000,        HTNOWHERE },
   };
 
   for (size_t i = 0; i < arraysize(cases); ++i) {
     gfx::Point point(cases[i].point, cases[i].point);
     EXPECT_EQ(cases[i].hit, frame->NonClientHitTest(point))
         << " with border: " << border << ", at point " << cases[i].point;
   }
 }
 
+TEST_F(DialogTest, HitTest_CloseButton) {
+  const NonClientView* view = dialog()->GetWidget()->non_client_view();
+  dialog()->set_show_close_button(true);
+  BubbleFrameView* frame = static_cast<BubbleFrameView*>(view->frame_view());
+  frame->ResetWindowControls();
+
+  const gfx::Rect close_button_bounds =
+      frame->GetCloseButtonForTest()->bounds();
+  EXPECT_EQ(HTCLOSE,
+            frame->NonClientHitTest(gfx::Point(close_button_bounds.x() + 4,
+                                               close_button_bounds.y() + 4)));
+}
+
 TEST_F(DialogTest, BoundsAccommodateTitle) {
   TestDialog* dialog2(new TestDialog());
   dialog2->set_title(base::ASCIIToUTF16("Title"));
   DialogDelegate::CreateDialogWidget(dialog2, GetContext(), nullptr);
 
   // Titled dialogs have taller initial frame bounds than untitled dialogs.
   View* frame1 = dialog()->GetWidget()->non_client_view()->frame_view();
   View* frame2 = dialog2->GetWidget()->non_client_view()->frame_view();
   EXPECT_LT(frame1->GetPreferredSize().height(),
             frame2->GetPreferredSize().height());
@@ skipping 86 matching lines @@
 }
 
 TEST_F(DialogTest, DontSnapWithoutButtons) {
   TestDialog dialog;
   EXPECT_TRUE(dialog.ShouldSnapFrameWidth());
   dialog.set_dialog_buttons(ui::DIALOG_BUTTON_NONE);
   EXPECT_FALSE(dialog.ShouldSnapFrameWidth());
 }
 
 }  // namespace views