MD History: Update sign in state in data source

chrome/browser/resources/md_history/app.crisper.js

Index: chrome/browser/resources/md_history/app.crisper.js
diff --git a/chrome/browser/resources/md_history/app.crisper.js b/chrome/browser/resources/md_history/app.crisper.js
index d52850e21e445823552e49306ae58008a927f4f7..3344d1b8ac5fd99e0e4be99d1745cb9d1ce09ce3 100644
--- a/chrome/browser/resources/md_history/app.crisper.js
+++ b/chrome/browser/resources/md_history/app.crisper.js
@@ -6475,10 +6475,10 @@ Polymer({
     }
     this.menuOpen = false;
   },
-  openMenu: function(anchor, itemData) {
+  openMenu: function(anchor, opt_itemData) {
     if (this.lastAnchor_ == anchor && this.menuOpen) return;
     if (this.menuOpen) this.closeMenu();
-    this.itemData = itemData;
+    this.itemData = opt_itemData || null;
     this.lastAnchor_ = anchor;
     this.$.dropdown.restoreFocusOnClose = true;
     var focusableChildren = Polymer.dom(this).querySelectorAll('[tabindex]:not([disabled]):not([hidden]),' + 'button:not([disabled]):not([hidden])');
@@ -6490,8 +6490,8 @@ Polymer({
     this.$.dropdown.positionTarget = anchor;
     this.menuOpen = true;
   },
-  toggleMenu: function(anchor, itemData) {
-    if (anchor == this.lastAnchor_ && this.menuOpen) this.closeMenu(); else this.openMenu(anchor, itemData);
+  toggleMenu: function(anchor, opt_itemData) {
+    if (anchor == this.lastAnchor_ && this.menuOpen) this.closeMenu(); else this.openMenu(anchor, opt_itemData);
   },
   onTabPressed_: function(e) {
     if (!this.firstFocus_ || !this.lastFocus_) return;
@@ -8559,7 +8559,6 @@ Polymer({
     scroll: 'onListScroll_'
   },
   attached: function() {
-    chrome.send('otherDevicesInitialized');
     md_history.BrowserService.getInstance().recordHistogram(SYNCED_TABS_HISTOGRAM_NAME, SyncedTabsHistogram.INITIALIZED, SyncedTabsHistogram.LIMIT);
   },
   getContentScrollTarget: function() {