Merge "Remove Profiler::isStub()"

diff --combined includes/profiler/ProfilerXhprof.php
index d178ce6,69d2552..808c5cd
--- 1/includes/profiler/ProfilerXhprof.php
--- 2/includes/profiler/ProfilerXhprof.php
+++ b/includes/profiler/ProfilerXhprof.php
@@@ -95,10 -95,6 +95,6 @@@ class ProfilerXhprof extends Profiler 
                $this->xhprof = new Xhprof( $params );
        }
  
-       public function isStub() {
-               return false;
-       }
- 
        /**
         * No-op for xhprof profiling.
         *
@@@ -130,7 -126,7 +126,7 @@@
  
                if ( $exists ) {
                        xhprof_frame_begin( $section );
 -                      return new ScopedCallback( function() use ( $section ) {
 +                      return new ScopedCallback( function() {
                                xhprof_frame_end();
                        } );
                }