Reduce FOR_EACH_OBSERVER usage in content/browser/renderer_host

content/browser/renderer_host/compositor_impl_android.cc

Index: content/browser/renderer_host/compositor_impl_android.cc
diff --git a/content/browser/renderer_host/compositor_impl_android.cc b/content/browser/renderer_host/compositor_impl_android.cc
index 04ffe1333939c60881c54cfa9aafe01c12151109..450adca102409a3c63450bda187a371c81bf584a 100644
--- a/content/browser/renderer_host/compositor_impl_android.cc
+++ b/content/browser/renderer_host/compositor_impl_android.cc
@@ -811,8 +811,8 @@ void CompositorImpl::RequestCopyOfOutputOnRootLayer(
 
 void CompositorImpl::OnVSync(base::TimeTicks frame_time,
                              base::TimeDelta vsync_period) {
-  FOR_EACH_OBSERVER(VSyncObserver, observer_list_,
-                    OnVSync(frame_time, vsync_period));
+  for (auto& observer : observer_list_)
+    observer.OnVSync(frame_time, vsync_period);
   if (needs_begin_frames_)
     root_window_->RequestVSyncUpdate();
 }