MD - Fix coloring of buttons on DL shelf.

chrome/browser/ui/views/download/download_shelf_view.h

Index: chrome/browser/ui/views/download/download_shelf_view.h
diff --git a/chrome/browser/ui/views/download/download_shelf_view.h b/chrome/browser/ui/views/download/download_shelf_view.h
index 2265ae942edb1f55e880cbb863aac3e812fa14c0..3c8fa19713c74d490dea0c6a13826c64960151e4 100644
--- a/chrome/browser/ui/views/download/download_shelf_view.h
+++ b/chrome/browser/ui/views/download/download_shelf_view.h
@@ -30,6 +30,7 @@ class PageNavigator;
 namespace views {
 class ImageButton;
 class ImageView;
+class MdTextButton;
 }
 
 // DownloadShelfView is a view that contains individual views for each download,
@@ -149,6 +150,9 @@ class DownloadShelfView : public views::AccessiblePaneView,
   // Link for showing all downloads. For MD this is a system style button.
   views::View* show_all_view_;
 
+  // This is the same as |show_all_view_|, but only valid in MD mode.
+  views::MdTextButton* show_all_view_md_;
+
   // Button for closing the downloads. This is contained as a child, and
   // deleted by View.
   views::ImageButton* close_button_;