manually fire change if not watcher is present

Author: clshortfuse

src/components/tooltip/tooltip.js

@@ -217,9 +217,15 @@ function MdTooltipDirective($timeout, $window, $$rAF, $document, $mdUtil, $mdThe
           $timeout(function() {
             scope.visible = setVisible.value;
             setVisible.queued = false;
+            if (!scope.visibleWatcher)
+              onVisibleChanged(scope.visible);
           }, scope.delay);
         } else {
-          $mdUtil.nextTick(function() { scope.visible = false; });
+          $mdUtil.nextTick(function() { 
+            scope.visible = false; 
+            if (!scope.visibleWatcher)
+              onVisibleChanged(false);
+          });
         }
       }
     }