Make all text buttons on download shelf work well with themes, not just the "show all" button.

ui/views/controls/button/md_text_button.cc

 // Copyright 2015 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/md_text_button.h"
 
 #include "base/i18n/case_conversion.h"
 #include "ui/base/material_design/material_design_controller.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/color_palette.h"
@@ skipping 60 matching lines @@
 
 // static
 MdTextButton* MdTextButton::Create(ButtonListener* listener,
                                    const base::string16& text) {
   MdTextButton* button = new MdTextButton(listener);
   button->SetText(text);
   button->SetFocusForPlatform();
   return button;
 }
 
+MdTextButton::~MdTextButton() {}
+
 void MdTextButton::SetProminent(bool is_prominent) {
   if (is_prominent_ == is_prominent)
     return;
 
   is_prominent_ = is_prominent;
   UpdateColors();
 }
 
 void MdTextButton::SetBgColorOverride(const base::Optional<SkColor>& color) {
   bg_color_override_ = color;
@@ skipping 100 matching lines @@
   label()->SetAutoColorReadabilityEnabled(false);
   set_request_focus_on_press(false);
   LabelButton::SetFontList(GetMdFontList());
 
   // Paint to a layer so that the canvas is snapped to pixel boundaries (useful
   // for fractional DSF).
   SetPaintToLayer(true);
   layer()->SetFillsBoundsOpaquely(false);
 }
 
-MdTextButton::~MdTextButton() {}
-
 void MdTextButton::UpdatePadding() {
   // Don't use font-based padding when there's no text visible.
   if (GetText().empty()) {
     SetBorder(Border::NullBorder());
     return;
   }
 
   // Text buttons default to 28dp in height on all platforms when the base font
   // is in use, but should grow or shrink if the font size is adjusted up or
   // down. When the system font size has been adjusted, the base font will be
@@ skipping 59 matching lines @@
 
   SkColor stroke_color =
       is_prominent_ ? SK_ColorTRANSPARENT : SkColorSetA(text_color, 0x33);
   DCHECK_EQ(SK_AlphaOPAQUE, static_cast<int>(SkColorGetA(bg_color)));
   set_background(Background::CreateBackgroundPainter(
       true, Painter::CreateRoundRectWith1PxBorderPainter(
                 bg_color, stroke_color, kInkDropSmallCornerRadius)));
 }
 
 }  // namespace views