MD History: Improve styling of grouped history toolbar during page load

chrome/browser/resources/md_history/app.vulcanized.html

Index: chrome/browser/resources/md_history/app.vulcanized.html
diff --git a/chrome/browser/resources/md_history/app.vulcanized.html b/chrome/browser/resources/md_history/app.vulcanized.html
index b636efe8cdbcaa4d6b3460fad0d961d5cbd7d4a5..cf226366bdcbe0daba103b4920daf19ab783eca6 100644
--- a/chrome/browser/resources/md_history/app.vulcanized.html
+++ b/chrome/browser/resources/md_history/app.vulcanized.html
@@ -2142,6 +2142,7 @@ a {
 button.icon-button {
   background: none;
         border: none;
+        color: inherit;
         height: 36px;
         outline: none;
         width: 36px;
@@ -2224,6 +2225,7 @@ a {
 button.icon-button {
   background: none;
         border: none;
+        color: inherit;
         height: 36px;
         outline: none;
         width: 36px;
@@ -2334,6 +2336,10 @@ paper-button {
         -webkit-margin-start: 2px;
 }
 
+paper-tabs:unresolved {
+  visibility: hidden;
+}
+
 paper-tabs {
   --paper-tabs_-_font-size: apply-shim-inherit;;
         --paper-tabs-selection-bar-color: #fff;
@@ -2736,6 +2742,7 @@ a {
 button.icon-button {
   background: none;
         border: none;
+        color: inherit;
         height: 36px;
         outline: none;
         width: 36px;
@@ -3041,6 +3048,7 @@ a {
 button.icon-button {
   background: none;
         border: none;
+        color: inherit;
         height: 36px;
         outline: none;
         width: 36px;
@@ -3145,6 +3153,7 @@ a {
 button.icon-button {
   background: none;
         border: none;
+        color: inherit;
         height: 36px;
         outline: none;
         width: 36px;
@@ -3451,6 +3460,7 @@ a {
 button.icon-button {
   background: none;
         border: none;
+        color: inherit;
         height: 36px;
         outline: none;
         width: 36px;
@@ -3646,6 +3656,7 @@ a {
 button.icon-button {
   background: none;
         border: none;
+        color: inherit;
         height: 36px;
         outline: none;
         width: 36px;