MD History: Address design nits

chrome/browser/resources/md_history/history_item.html

Index: chrome/browser/resources/md_history/history_item.html
diff --git a/chrome/browser/resources/md_history/history_item.html b/chrome/browser/resources/md_history/history_item.html
index 6744333a13ca3c3eb49716b621d0803357145a20..fc6bc00b4fd9cfdf8d3243bb4aec3b0d7d864631 100644
--- a/chrome/browser/resources/md_history/history_item.html
+++ b/chrome/browser/resources/md_history/history_item.html
@@ -24,6 +24,7 @@
       #main-container {
         background: #fff;
         border-color: var(--card-border-color);
+        border-radius: 2px;
         border-style: var(--border-style, solid);
         border-width: 0 1px;
         max-width: var(--card-max-width);
@@ -55,7 +56,7 @@
       #item-container {
         @apply(--layout-center);
         @apply(--layout-horizontal);
-        min-height: 40px;
+        min-height: var(--item-height);
       }
 
       :host([is-card-start]) #item-container {
@@ -70,14 +71,13 @@
         @apply(--layout-center);
         @apply(--layout-flex);
         @apply(--layout-horizontal);
-        min-height: 40px;
         overflow: hidden;
       }
 
       paper-checkbox {
         --paper-checkbox-checked-color: rgb(68, 136, 255);
         --paper-checkbox-size: 16px;
-        --paper-checkbox-unchecked-color: #969696;
+        --paper-checkbox-unchecked-color: var(--secondary-text-color);
         height: 16px;
         margin: 0 16px 0 20px;
         padding: 2px;
@@ -91,14 +91,14 @@
 
       #domain {
         -webkit-margin-start: 16px;
-        color: #969696;
+        color: var(--secondary-text-color);
         flex-shrink: 0;
       }
 
       #menu-button {
         -webkit-margin-end: 12px;
         -webkit-margin-start: 2px;
-        color: #969696;
+        color: var(--secondary-text-color);
         height: 36px;
         width: 36px;
       }