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

ash/system/toast/toast_overlay.cc

 // Copyright 2016 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 "ash/system/toast/toast_overlay.h"
 
+#include "ash/public/cpp/ash_typography.h"
 #include "ash/public/cpp/shell_window_ids.h"
 #include "ash/root_window_controller.h"
 #include "ash/shelf/wm_shelf.h"
 #include "ash/shell.h"
 #include "ash/strings/grit/ash_strings.h"
 #include "ash/wm_window.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/base/l10n/l10n_util.h"
-#include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/font_list.h"
 #include "ui/views/border.h"
 #include "ui/views/controls/button/label_button.h"
 #include "ui/views/controls/label.h"
 #include "ui/views/layout/box_layout.h"
 #include "ui/views/view.h"
 #include "ui/views/widget/widget.h"
 #include "ui/views/widget/widget_delegate.h"
 #include "ui/wm/core/window_animations.h"
 
 namespace ash {
 
 namespace {
 
 // Offset of the overlay from the edge of the work area.
 const int kOffset = 5;
 
-// Font style used for modifier key labels.
-const ui::ResourceBundle::FontStyle kTextFontStyle =
-    ui::ResourceBundle::MediumFont;
-
 // Duration of slide animation when overlay is shown or hidden.
 const int kSlideAnimationDurationMs = 100;
 
 // Colors for the dismiss button.
 const SkColor kButtonBackgroundColor = SkColorSetARGB(0xFF, 0x32, 0x32, 0x32);
 const SkColor kButtonTextColor = SkColorSetARGB(0xFF, 0x7B, 0xAA, 0xF7);
 
 // These values are in DIP.
 const int kToastHorizontalSpacing = 16;
 const int kToastVerticalSpacing = 16;
@@ skipping 13 matching lines @@
 //  ToastOverlayLabel
 class ToastOverlayLabel : public views::Label {
  public:
   explicit ToastOverlayLabel(const base::string16& label);
   ~ToastOverlayLabel() override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ToastOverlayLabel);
 };
 
-ToastOverlayLabel::ToastOverlayLabel(const base::string16& label) {
-  ui::ResourceBundle* rb = &ui::ResourceBundle::GetSharedInstance();
-
-  SetText(label);
+ToastOverlayLabel::ToastOverlayLabel(const base::string16& label)
+    : Label(label, CONTEXT_TOAST_OVERLAY) {
   SetHorizontalAlignment(gfx::ALIGN_LEFT);
-  SetFontList(rb->GetFontList(kTextFontStyle));
   SetAutoColorReadabilityEnabled(false);
   SetMultiLine(true);
   SetEnabledColor(SK_ColorWHITE);
   SetDisabledColor(SK_ColorWHITE);
   SetSubpixelRenderingEnabled(false);
 
   int verticalSpacing =
       kToastVerticalSpacing - (GetPreferredSize().height() - GetBaseline());
   SetBorder(views::CreateEmptyBorder(verticalSpacing, kToastHorizontalSpacing,
                                      verticalSpacing, kToastHorizontalSpacing));
@@ skipping 10 matching lines @@
   ~ToastOverlayButton() override {}
 
  private:
   friend class ToastOverlay;  // for ToastOverlay::ClickDismissButtonForTesting.
 
   DISALLOW_COPY_AND_ASSIGN(ToastOverlayButton);
 };
 
 ToastOverlayButton::ToastOverlayButton(views::ButtonListener* listener,
                                        const base::string16& text)
-    : views::LabelButton(listener, text) {
+    : views::LabelButton(listener, text, CONTEXT_TOAST_OVERLAY) {
   SetInkDropMode(InkDropMode::ON);
   set_has_ink_drop_action_on_click(true);
   set_ink_drop_base_color(SK_ColorWHITE);
 
-  ui::ResourceBundle* rb = &ui::ResourceBundle::GetSharedInstance();
-
   SetEnabledTextColors(kButtonTextColor);
-  SetFontList(rb->GetFontList(kTextFontStyle));
 
   // Treat the space below the baseline as a margin.
   int verticalSpacing = kToastVerticalSpacing -
                         (GetPreferredSize().height() - label()->GetBaseline());
   SetBorder(views::CreateEmptyBorder(verticalSpacing, kToastHorizontalSpacing,
                                      verticalSpacing, kToastHorizontalSpacing));
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 //  ToastOverlayView
@@ skipping 171 matching lines @@
 ToastOverlayButton* ToastOverlay::dismiss_button_for_testing() {
   return overlay_view_->button();
 }
 
 void ToastOverlay::ClickDismissButtonForTesting(const ui::Event& event) {
   DCHECK(overlay_view_->button());
   overlay_view_->button()->NotifyClick(event);
 }
 
 }  // namespace ash