MD History: fix side nav layout in RTL

chrome/browser/resources/md_history/app.html

Index: chrome/browser/resources/md_history/app.html
diff --git a/chrome/browser/resources/md_history/app.html b/chrome/browser/resources/md_history/app.html
index f88cbdf77af638e6ac0e7e91498b184e076f8bc3..02f65d4d459395322678379c27e81e53766b9a47 100644
--- a/chrome/browser/resources/md_history/app.html
+++ b/chrome/browser/resources/md_history/app.html
@@ -28,7 +28,7 @@
       }
 
       /* Sizing this with flex causes slow load performance, see
-         crbug.com/618153. */
+       * crbug.com/618153. TODO(dbeam): is this still an issue? */

[tsergeant, 2016/08/23 23:06:59]

It's not, I just haven't had a chance to get back to it yet.

       #main-container {
         height: calc(100% - var(--toolbar-height));
       }
@@ -41,6 +41,10 @@
         float: left;
       }
 
+      :host-context([dir='rtl']) #content-side-bar {
+        float: right;
+      }
+
       #content,
       #content > * {
         height: 100%;