MD History: Fix content sidebar in RTL languages

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 dbf6ce623ab8923433c8727b854ba8a597ce4142..689b625476c4fc9a0c7036f8c694069c4c4511eb 100644
--- a/chrome/browser/resources/md_history/app.vulcanized.html
+++ b/chrome/browser/resources/md_history/app.vulcanized.html
@@ -3976,6 +3976,10 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
         float: left;
       }
 
+      :host-context([dir=rtl]) #content-side-bar {
+        float: right;
+      }
+
       #content,
       #content > * {
         height: 100%;