Implement Harmony typography spec.

ui/views/controls/button/label_button.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/button/label_button.h"
 
 #include <stddef.h>
 
 #include <utility>
 
@@ skipping 216 matching lines @@
 void LabelButton::SetFocusPainter(std::unique_ptr<Painter> focus_painter) {
   focus_painter_ = std::move(focus_painter);
 }
 
 gfx::Size LabelButton::GetPreferredSize() const {
   if (cached_preferred_size_valid_)
     return cached_preferred_size_;
 
   // Use a temporary label copy for sizing to avoid calculation side-effects.
   Label label(GetText(), {label_->font_list()});
+  label.SetLineHeight(label_->line_height());
   label.SetShadows(label_->shadows());
 
   if (style_ == STYLE_BUTTON && PlatformStyle::kDefaultLabelButtonHasBoldFont) {
     // Some text appears wider when rendered normally than when rendered bold.
     // Accommodate the widest, as buttons may show bold and shouldn't resize.
     const int current_width = label.GetPreferredSize().width();
     label.SetFontList(cached_bold_font_list_);
     if (label.GetPreferredSize().width() < current_width)
       label.SetFontList(label_->font_list());
   }
@@ skipping 353 matching lines @@
           : PlatformStyle::TextColorForButton(button_state_colors_, *this);
   if (state() != STATE_DISABLED && label_->enabled_color() != color)
     label_->SetEnabledColor(color);
 }
 
 bool LabelButton::UseFloodFillInkDrop() const {
   return !GetText().empty();
 }
 
 }  // namespace views