Convert GetPreferredSize from:...

chrome/views/native_scroll_bar.cc

 // Copyright (c) 2006-2008 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 "chrome/views/native_scroll_bar.h"
 
 #include <math.h>
 #include <atlbase.h>
 #include <atlapp.h>
 #include <atlcrack.h>
@@ skipping 232 matching lines @@
     GetLocalBounds(&lb, true);
     sb_view_->SetBounds(0, 0, lb.Width(), lb.Height());
   }
 }
 
 void NativeScrollBar::DidChangeBounds(const CRect& previous,
                                       const CRect& current) {
   Layout();
 }
 
-void NativeScrollBar::GetPreferredSize(CSize *out) {
-  DCHECK(out);
-  if (IsHorizontal()) {
-    out->cx = 0;
-    out->cy = GetLayoutSize();
-  } else {
-    out->cx = GetLayoutSize();
-    out->cy = 0;
-  }
+gfx::Size NativeScrollBar::GetPreferredSize() {
+  if (IsHorizontal())
+    return gfx::Size(0, GetLayoutSize());
+  return gfx::Size(GetLayoutSize(), 0);
 }
 
 void NativeScrollBar::Update(int viewport_size, int content_size, int current_pos) {
   ScrollBar::Update(viewport_size, content_size, current_pos);
   if (!sb_container_)
     return;
 
   if (content_size < 0)
     content_size = 0;
 
@@ skipping 86 matching lines @@
   return ::GetSystemMetrics(SM_CYHSCROLL);
 }
 
 //static
 int NativeScrollBar::GetVerticalScrollBarWidth() {
   return ::GetSystemMetrics(SM_CXVSCROLL);
 }
 
 }