[MD History] Add URL parameter for search.

chrome/browser/resources/md_history/side_bar.js

Index: chrome/browser/resources/md_history/side_bar.js
diff --git a/chrome/browser/resources/md_history/side_bar.js b/chrome/browser/resources/md_history/side_bar.js
index e794065333a2c68745395db89b8db78b3cf4b541..52b2113d3f939ae5f4ad2709f972b45306e79ed2 100644
--- a/chrome/browser/resources/md_history/side_bar.js
+++ b/chrome/browser/resources/md_history/side_bar.js
@@ -10,6 +10,8 @@ Polymer({
       type: String,
       notify: true
     },
+
+    route: Object,
   },
 
   /**
@@ -31,5 +33,9 @@ Polymer({
       return 'history';
 
     return selectedPage;
+  },
+
+  getQueryString_: function(route) {
+    return window.location.search;
   }
 });