Simplify some code in c/b/u/views.

chrome/browser/ui/views/validation_message_bubble_view.cc

Index: chrome/browser/ui/views/validation_message_bubble_view.cc
diff --git a/chrome/browser/ui/views/validation_message_bubble_view.cc b/chrome/browser/ui/views/validation_message_bubble_view.cc
index 2c57d120188a01cbe139514263c98687d8333cb7..788da2db1ff3ee47b95808bc6ada0e58864ec8c9 100644
--- a/chrome/browser/ui/views/validation_message_bubble_view.cc
+++ b/chrome/browser/ui/views/validation_message_bubble_view.cc
@@ -75,7 +75,7 @@ ValidationMessageBubbleView::ValidationMessageBubbleView(
     content_bottom += kTextVerticalMargin + sub_label->height();
   }
 
-  size_ = gfx::Size(text_start_x + label_width, content_bottom);
+  set_preferred_size(gfx::Size(text_start_x + label_width, content_bottom));
 
   views::BubbleDialogDelegateView::CreateBubble(this)->ShowInactive();
 }
@@ -92,10 +92,6 @@ gfx::Rect ValidationMessageBubbleView::RootViewToScreenRect(
          render_widget_host_view->GetViewBounds().origin().OffsetFromOrigin();
 }
 
-gfx::Size ValidationMessageBubbleView::GetPreferredSize() const {
-  return size_;
-}
-
 int ValidationMessageBubbleView::GetDialogButtons() const {
   return ui::DIALOG_BUTTON_NONE;
 }