Fixed BubbleBorder sizing problems & added unit tests.

ui/views/bubble/tray_bubble_view.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 "ui/views/bubble/tray_bubble_view.h"
 
 #include <algorithm>
 
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/skia/include/core/SkColor.h"
@@ skipping 363 matching lines @@
   if (preferred_width_ == width)
     return;
   preferred_width_ = width;
   if (GetWidget())
     SizeToContents();
 }
 
 void TrayBubbleView::SetArrowPaintType(
     views::BubbleBorder::ArrowPaintType paint_type) {
   bubble_border_->set_paint_arrow(paint_type);
+  UpdateBubble();
 }
 
 gfx::Insets TrayBubbleView::GetBorderInsets() const {
   return bubble_border_->GetInsets();
 }
 
 void TrayBubbleView::Init() {
   BoxLayout* layout = new BottomAlignedBoxLayout(this);
   layout->SetDefaultFlex(1);
   SetLayoutManager(layout);
@@ skipping 106 matching lines @@
 void TrayBubbleView::ViewHierarchyChanged(
     const ViewHierarchyChangedDetails& details) {
   if (details.is_add && details.child == this) {
     details.parent->SetPaintToLayer(true);
     details.parent->SetFillsBoundsOpaquely(true);
     details.parent->layer()->SetMasksToBounds(true);
   }
 }
 
 }  // namespace views