Use views::style for buttons, bootstrap ash_typography to do so.

ui/views/controls/button/label_button.h

 // 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.
 
 #ifndef UI_VIEWS_CONTROLS_BUTTON_LABEL_BUTTON_H_
 #define UI_VIEWS_CONTROLS_BUTTON_LABEL_BUTTON_H_
 
 #include <array>
 #include <memory>
 
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/image/image_skia.h"
 #include "ui/views/controls/button/custom_button.h"
 #include "ui/views/controls/image_view.h"
 #include "ui/views/controls/label.h"
 #include "ui/views/native_theme_delegate.h"
+#include "ui/views/style/typography.h"
 
 namespace views {
 
 class InkDropContainerView;
 class LabelButtonBorder;
 class Painter;
 
 // LabelButton is a button with text and an icon, it's not focusable by default.
 class VIEWS_EXPORT LabelButton : public CustomButton,
                                  public NativeThemeDelegate {
  public:
   // The length of the hover fade animation.
   static const int kHoverAnimationDurationMs;
 
   static const char kViewClassName[];
 
-  LabelButton(ButtonListener* listener, const base::string16& text);
+  // Creates a LabelButton with ButtonPressed() events sent to |listener| and
+  // label |text|. |button_context| is a value from views::style::TextContext
+  // and determines the appearance of |text|.
+  LabelButton(ButtonListener* listener,
+              const base::string16& text,
+              int button_context = style::CONTEXT_LABEL);
   ~LabelButton() override;
 
   // Gets or sets the image shown for the specified button state.
   // GetImage returns the image for STATE_NORMAL if the state's image is empty.
   virtual gfx::ImageSkia GetImage(ButtonState for_state) const;
   void SetImage(ButtonState for_state, const gfx::ImageSkia& image);
 
   // Gets or sets the text shown on the button.
   const base::string16& GetText() const;
   virtual void SetText(const base::string16& text);
 
   // Sets the text color shown for the specified button |for_state| to |color|.
   void SetTextColor(ButtonState for_state, SkColor color);
 
   // Sets the text colors shown for the non-disabled states to |color|.
   virtual void SetEnabledTextColors(SkColor color);
 
   // Sets drop shadows underneath the text.
   void SetTextShadows(const gfx::ShadowValues& shadows);
 
   // Sets whether subpixel rendering is used on the label.
   void SetTextSubpixelRenderingEnabled(bool enabled);
 
-  // Adjusts the font size up or down by the given amount.
-  virtual void AdjustFontSize(int font_size_delta);
-
   // Sets the elide behavior of this button.
   void SetElideBehavior(gfx::ElideBehavior elide_behavior);
 
   // Sets the horizontal alignment used for the button; reversed in RTL. The
   // optional image will lead the text, unless the button is right-aligned.
   void SetHorizontalAlignment(gfx::HorizontalAlignment alignment);
 
   // Call SetMinSize(gfx::Size()) to clear the monotonically increasing size.
   void SetMinSize(const gfx::Size& min_size);
   void SetMaxSize(const gfx::Size& max_size);
@@ skipping 36 matching lines @@
   Label* label() const { return label_; }
 
   bool explicitly_set_normal_color() const {
     return explicitly_set_colors_[STATE_NORMAL];
   }
 
   // Returns the available area for the label and image. Subclasses can change
   // these bounds if they need room to do manual painting.
   virtual gfx::Rect GetChildAreaBounds();
 
-  // Sets the font list used by this button.
-  virtual void SetFontList(const gfx::FontList& font_list);
-
   // View:
   void OnPaint(gfx::Canvas* canvas) override;
   void OnFocus() override;
   void OnBlur() override;
   void OnNativeThemeChanged(const ui::NativeTheme* theme) override;
 
   // CustomButton:
   void StateChanged(ButtonState old_state) override;
 
   // Fills |params| with information about the button.
@@ skipping 54 matching lines @@
 
   // The image and label shown in the button.
   ImageView* image_;
   Label* label_;
 
   // A separate view is necessary to hold the ink drop layer so that it can
   // be stacked below |image_| and on top of |label_|, without resorting to
   // drawing |label_| on a layer (which can mess with subpixel anti-aliasing).
   InkDropContainerView* ink_drop_container_;
 
-  // The cached font lists in the normal and bold style.
+  // The cached font lists in the normal and default button style. The latter
+  // may be bold.
   gfx::FontList cached_normal_font_list_;
-  gfx::FontList cached_bold_font_list_;
+  gfx::FontList cached_default_button_font_list_;
 
   // The images and colors for each button state.
   gfx::ImageSkia button_state_images_[STATE_COUNT];
   SkColor button_state_colors_[STATE_COUNT];
 
   // Used to track whether SetTextColor() has been invoked.
   std::array<bool, STATE_COUNT> explicitly_set_colors_;
 
   // |min_size_| increases monotonically with the preferred size.
   mutable gfx::Size min_size_;
@@ skipping 25 matching lines @@
   gfx::HorizontalAlignment horizontal_alignment_;
 
   std::unique_ptr<Painter> focus_painter_;
 
   DISALLOW_COPY_AND_ASSIGN(LabelButton);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_BUTTON_LABEL_BUTTON_H_