Couple of fixes for DesktopWindowTreeHostMus.

ui/views/bubble/bubble_frame_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/bubble_frame_view.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "build/build_config.h"
@@ skipping 389 matching lines @@
                     content_margins_.top(), 0));
   footnote_container_->set_background(
       Background::CreateSolidBackground(kFootnoteBackgroundColor));
   footnote_container_->SetBorder(
       CreateSolidSidedBorder(1, 0, 0, 0, kFootnoteBorderColor));
   footnote_container_->AddChildView(view);
   AddChildView(footnote_container_);
 }
 
 gfx::Rect BubbleFrameView::GetUpdatedWindowBounds(const gfx::Rect& anchor_rect,
-                                                  gfx::Size client_size,
+                                                  const gfx::Size& client_size,
                                                   bool adjust_if_offscreen) {
   gfx::Size size(GetSizeForClientSize(client_size));
 
   const BubbleBorder::Arrow arrow = bubble_border_->arrow();
   if (adjust_if_offscreen && BubbleBorder::has_arrow(arrow)) {
     // Try to mirror the anchoring if the bubble does not fit on the screen.
     if (!bubble_border_->is_arrow_at_center(arrow)) {
       MirrorArrowIfOffScreen(true, anchor_rect, size);
       MirrorArrowIfOffScreen(false, anchor_rect, size);
     } else {
@@ skipping 107 matching lines @@
   size.Enlarge(client_insets.width(), client_insets.height());
   size.SetToMax(gfx::Size(title_bar_width, 0));
 
   if (footnote_container_)
     size.Enlarge(0, footnote_container_->GetHeightForWidth(size.width()));
 
   return size;
 }
 
 }  // namespace views