Support vertical centering of multi-line labels.

ui/views/controls/label.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/controls/label.h"
 
 #include <algorithm>
 #include <cmath>
 #include <limits>
 #include <vector>
@@ skipping 419 matching lines @@
       // from the use of GetTextExtentPoint32() on Windows.
       origin.Offset((available.width() + 1 - text_size.width()) / 2, 0);
       break;
     case gfx::ALIGN_RIGHT:
       origin.set_x(available.right() - text_size.width());
       break;
     default:
       NOTREACHED();
       break;
   }
-  text_size.set_height(available.height());
+  if (!multi_line_)
+    text_size.set_height(available.height());
+  // Support vertical centering of multi-line labels: http://crbug.com/429595
+  origin.Offset(0, std::max(0, (available.height() - text_size.height())) / 2);
   return gfx::Rect(origin, text_size);
 }
 
 int Label::ComputeDrawStringFlags() const {
   int flags = 0;
 
   // We can't use subpixel rendering if the background is non-opaque.
   if (SkColorGetA(background_color_) != 0xFF || !subpixel_rendering_enabled_)
     flags |= gfx::Canvas::NO_SUBPIXEL_RENDERING;
 
@@ skipping 88 matching lines @@
 }
 
 bool Label::ShouldShowDefaultTooltip() const {
   const gfx::Size text_size = GetTextSize();
   const gfx::Size size = GetContentsBounds().size();
   return !obscured() && (text_size.width() > size.width() ||
                          (multi_line_ && text_size.height() > size.height()));
 }
 
 }  // namespace views