History: Always show sync notification if the user is signed in.

BUG=229030
TEST=Sign in to Chrome, go to advanced sync settings and disable
the "history" datatype. Visit chrome://history and ensure that it
says "Showing history from this device" at the top of the page.

Review URL: https://chromiumcodereview.appspot.com/14170006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@193742 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/resources/history/history.js

@@ -457,10 +457,12 @@ HistoryModel.prototype.addResults = function(info, results) {
     lastDay = thisDay;
   }
 
-  if (loadTimeData.getBoolean('isFullHistorySyncEnabled')) {
+  if (loadTimeData.getBoolean('isUserSignedIn')) {
     if (info.hasSyncedResults) {
       this.view_.showNotification(loadTimeData.getString('hasSyncedResults'));
     } else {
+      // TODO(dubroy): This resource should be renamed, since it's not just used
+      // when there are no results from the server.
       this.view_.showNotification(
           loadTimeData.getString('noResponseFromServer'));
     }