MD History: Add responsive layout which hides the sidebar in thin windows

chrome/browser/resources/md_history/app.js

Index: chrome/browser/resources/md_history/app.js
diff --git a/chrome/browser/resources/md_history/app.js b/chrome/browser/resources/md_history/app.js
index 93f805653292a613e3cc88f2c9e31bbb1b6a2616..22f36b8bafeb1502d3f274ecffbcad535bac6fee 100644
--- a/chrome/browser/resources/md_history/app.js
+++ b/chrome/browser/resources/md_history/app.js
@@ -19,7 +19,11 @@ Polymer({
 
   properties: {
     // The id of the currently selected page.
-    selectedPage_: String,
+    selectedPage_: {
+      type: String,
+      value: 'history-list',
+      observer: 'unselectAll'
+    },
 
     // Whether domain-grouped history is enabled.
     grouped_: Boolean,
@@ -60,6 +64,7 @@ Polymer({
 
   // TODO(calamity): Replace these event listeners with data bound properties.
   listeners: {
+    'cr-toolbar-menu-click': 'onMenuClick_',
     'history-checkbox-select': 'checkboxSelected',
     'unselect-all': 'unselectAll',
     'delete-selected': 'deleteSelected',
@@ -72,6 +77,10 @@ Polymer({
     this.grouped_ = loadTimeData.getBoolean('groupByDomain');
   },
 
+  onMenuClick_: function() {
+    this.$['side-bar'].toggle();
+  },
+
   /**
    * Listens for history-item being selected or deselected (through checkbox)
    * and changes the view of the top toolbar.