Improve console message about deferring long-running timers.

components/scheduler/renderer/renderer_scheduler_impl.cc

Index: components/scheduler/renderer/renderer_scheduler_impl.cc
diff --git a/components/scheduler/renderer/renderer_scheduler_impl.cc b/components/scheduler/renderer/renderer_scheduler_impl.cc
index 135cdabc2486402b877738d7df5b405f279ba045..5add212d251922ed56c12f00ebc0a7a214e913e9 100644
--- a/components/scheduler/renderer/renderer_scheduler_impl.cc
+++ b/components/scheduler/renderer/renderer_scheduler_impl.cc
@@ -1315,8 +1315,11 @@ void RendererSchedulerImpl::OnTriedToExecuteBlockedTask(
     MainThreadOnly().have_reported_blocking_intervention_since_navigation =
         true;
     BroadcastConsoleWarning(
-        "Deferred long-running timer task(s) to improve scrolling smoothness. "
-        "See crbug.com/574343.");
+        "Blink deferred a task in order to make scrolling smoother. "
+        "Your timer tasks should take less than 50ms to run to avoid this. "
+        "Please see "
+        "https://developers.google.com/web/tools/chrome-devtools/profile/evaluate-performance/rail"
+        " and https://crbug.com/574343#c40 for more information.");
   }
 }