Adjust action button styling in MD notification.

ui/message_center/views/notification_view_md.cc

 // Copyright 2017 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/message_center/views/notification_view_md.h"
 
 #include <stddef.h>
 
+#include "base/i18n/case_conversion.h"
 #include "base/strings/string_util.h"
 #include "ui/base/cursor/cursor.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/gfx/image/image_skia_operations.h"
 #include "ui/gfx/paint_vector_icon.h"
 #include "ui/gfx/skia_util.h"
 #include "ui/gfx/text_elider.h"
 #include "ui/message_center/message_center.h"
@@ skipping 195 matching lines @@
   title_view_->SetText(title);
   message_view_->SetText(message);
 
   views::View::OnPaint(canvas);
 }
 
 // NotificationButtonMD ////////////////////////////////////////////////////////
 
 // This class is needed in addition to LabelButton mainly becuase we want to set
 // visible_opacity of InkDropHighlight.
+// This button capitalizes the given label string.
 class NotificationButtonMD : public views::LabelButton {
  public:
   NotificationButtonMD(views::ButtonListener* listener,
                        const base::string16& text);
   ~NotificationButtonMD() override;
 
+  void SetText(const base::string16& text) override;
+
   std::unique_ptr<views::InkDropHighlight> CreateInkDropHighlight()
       const override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(NotificationButtonMD);
 };
 
 NotificationButtonMD::NotificationButtonMD(views::ButtonListener* listener,
                                            const base::string16& text)
-    : views::LabelButton(listener, text, views::style::CONTEXT_BUTTON_MD) {
+    : views::LabelButton(listener,
+                         base::i18n::ToUpper(text),
+                         views::style::CONTEXT_BUTTON_MD) {
+  SetHorizontalAlignment(gfx::ALIGN_CENTER);
   SetInkDropMode(views::LabelButton::InkDropMode::ON);
   set_has_ink_drop_action_on_click(true);
   set_ink_drop_base_color(kActionButtonInkDropBaseColor);
   set_ink_drop_visible_opacity(kActionButtonInkDropRippleVisibleOpacity);
   SetEnabledTextColors(kActionButtonTextColor);
   SetBorder(views::CreateEmptyBorder(kActionButtonPadding));
   SetMinSize(kActionButtonMinSize);
   SetFocusForPlatform();
 }
 
 NotificationButtonMD::~NotificationButtonMD() = default;
 
+void NotificationButtonMD::SetText(const base::string16& text) {
+  views::LabelButton::SetText(base::i18n::ToUpper(text));
+}
+
 std::unique_ptr<views::InkDropHighlight>
 NotificationButtonMD::CreateInkDropHighlight() const {
   std::unique_ptr<views::InkDropHighlight> highlight =
       views::LabelButton::CreateInkDropHighlight();
   highlight->set_visible_opacity(kActionButtonInkDropHighlightVisibleOpacity);
   return highlight;
 }
 
 }  // anonymous namespace
 
@@ skipping 506 matching lines @@
                                   header_row_->expand_button()->HasFocus()) ||
                                  (header_row_->IsCloseButtonEnabled() &&
                                   header_row_->close_button()->HasFocus()) ||
                                  (header_row_->IsSettingsButtonEnabled() &&
                                   header_row_->settings_button()->HasFocus());
 
   header_row_->SetControlButtonsVisible(target_visibility);
 }
 
 }  // namespace message_center