views: implement width snapping for DialogDelegateViews

ui/views/bubble/bubble_dialog_delegate_unittest.cc

 // Copyright 2016 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/views/bubble/bubble_dialog_delegate.h"
 
 #include <stddef.h>
 
 #include "base/i18n/rtl.h"
 #include "base/macros.h"
@@ skipping 15 matching lines @@
   TestBubbleDialogDelegateView(View* anchor_view)
       : BubbleDialogDelegateView(anchor_view, BubbleBorder::TOP_LEFT),
         view_(new View()) {
     view_->SetFocusBehavior(FocusBehavior::ALWAYS);
     AddChildView(view_);
   }
   ~TestBubbleDialogDelegateView() override {}
 
   // BubbleDialogDelegateView overrides:
   View* GetInitiallyFocusedView() override { return view_; }
-  gfx::Size GetPreferredSize() const override { return gfx::Size(200, 200); }
+  gfx::Size GetUnsnappedPreferredSize() const override {
+    return gfx::Size(200, 200);
+  }
 
   using BubbleDialogDelegateView::SetAnchorRect;
   using BubbleDialogDelegateView::GetBubbleFrameView;
 
  private:
   View* view_;
 
   DISALLOW_COPY_AND_ASSIGN(TestBubbleDialogDelegateView);
 };
 
@@ skipping 278 matching lines @@
     ASSERT_TRUE(close_button);
     frame_view->ButtonPressed(
         close_button,
         ui::MouseEvent(ui::ET_MOUSE_PRESSED, gfx::Point(), gfx::Point(),
                        ui::EventTimeForNow(), ui::EF_NONE, ui::EF_NONE));
     EXPECT_TRUE(bubble_widget->IsClosed());
   }
 }
 
 }  // namespace views