views: implement width snapping for DialogDelegateViews

ui/views/bubble/bubble_dialog_delegate_unittest.cc

Index: ui/views/bubble/bubble_dialog_delegate_unittest.cc
diff --git a/ui/views/bubble/bubble_dialog_delegate_unittest.cc b/ui/views/bubble/bubble_dialog_delegate_unittest.cc
index d64355810fe4154201121edabe2011b8a50e7909..d865632c328c06c384f67f168aed856d94b4f1ea 100644
--- a/ui/views/bubble/bubble_dialog_delegate_unittest.cc
+++ b/ui/views/bubble/bubble_dialog_delegate_unittest.cc
@@ -33,7 +33,9 @@ class TestBubbleDialogDelegateView : public BubbleDialogDelegateView {
 
   // 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;