Mac: adjust sizes of progress bars to be equal to painted size.

third_party/WebKit/Source/core/layout/LayoutTheme.cpp

 /**
  * This file is part of the theme implementation for form controls in WebCore.
  *
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Computer, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 162 matching lines @@
             // Font
             FontDescription controlFont = m_platformTheme->controlFont(part, style.font().getFontDescription(), style.effectiveZoom());
             if (controlFont != style.font().getFontDescription()) {
                 // Reset our line-height
                 style.setLineHeight(ComputedStyle::initialLineHeight());
 
                 // Now update our font.
                 if (style.setFontDescription(controlFont))
                     style.font().update(nullptr);
             }
+            break;
         }
+        case ProgressBarPart:
+            adjustProgressBarBounds(style);
+            break;
         default:
             break;
         }
     }
 
     if (!m_platformTheme) {
         // Call the appropriate style adjustment method based off the appearance value.
         switch (style.appearance()) {
         case CheckboxPart:
             return adjustCheckboxStyle(style);
@@ skipping 739 matching lines @@
 
     // padding - not honored by WinIE, needs to be removed.
     style.resetPadding();
 
     // border - honored by WinIE, but looks terrible (just paints in the control box and turns off the Windows XP theme)
     // for now, we will not honor it.
     style.resetBorder();
 }
 
 } // namespace blink