Bug 815715 - Send location change methods even if we're just moving inside the same document. r=bnicholson

mobile/android/base/Tab.java

@@ -551,6 +551,8 @@ public class Tab {
         setDocumentURI(message.getString("documentURI"));
         if (message.getBoolean("sameDocument")) {
             // We can get a location change event for the same document with an anchor tag
+            // Notify listeners so that buttons like back or forward will update themselves
+            Tabs.getInstance().notifyListeners(this, Tabs.TabEvents.LOCATION_CHANGE, uri);
             return;
         }