Dark Mode: change downloads paper-progress colors

Spec: https://docs.google.com/presentation/d/1kJoBzf_HGYK-_FAJPAjD67TW8224dCPLA6dAhlDmysk/edit#slide=id.g4a64df24f4_20_0

R=aee@chromium.org
BUG=883049

Change-Id: Ice71c5ff0a9e640343a3c602154f410386944d72
Reviewed-on: https://chromium-review.googlesource.com/c/1403347
Reviewed-by: Esmael El-Moslimany <aee@chromium.org>
Commit-Queue: Dan Beam <dbeam@chromium.org>
Cr-Commit-Position: refs/heads/master@{#621344}
diff --git a/chrome/browser/resources/md_downloads/item.html b/chrome/browser/resources/md_downloads/item.html
index c2c9079..658d1ae0 100644
--- a/chrome/browser/resources/md_downloads/item.html
+++ b/chrome/browser/resources/md_downloads/item.html
@@ -100,7 +100,7 @@
         text-decoration: line-through;
       }
 
-      :host-context([dark]) #content:not(.is-active) #name {
+      :host-context([dark]) #content:not(.is-active) :-webkit-any(#name, #tag) {
         color: var(--google-grey-500);
       }
 
@@ -193,11 +193,17 @@
       }
 
       #progress {
+        /* TODO(dbeam): border-radius on container and progress bar. */
         --paper-progress-active-color: var(--google-blue-600);
         --paper-progress-container-color: rgb(223, 222, 223);
         width: auto;
       }
 
+      :host-context([dark]) #progress {
+        --paper-progress-active-color: var(--google-blue-300);
+        --paper-progress-container-color: var(--google-grey-800);
+      }
+
       #show {
         margin: .7em 0;
       }