Migrate ProcessesEventRouter to the new task manager

chrome/browser/task_management/providers/task_provider.h

Index: chrome/browser/task_management/providers/task_provider.h
diff --git a/chrome/browser/task_management/providers/task_provider.h b/chrome/browser/task_management/providers/task_provider.h
index e4387cf65b1ca474dea9ed093aa299bf760ab54e..545e9a197ad3f1b97d5a879cc276f312afaf45ed 100644
--- a/chrome/browser/task_management/providers/task_provider.h
+++ b/chrome/browser/task_management/providers/task_provider.h
@@ -45,10 +45,11 @@ class TaskProvider {
 
  protected:
   // Used by concrete task providers to notify the observer of tasks addition/
-  // removal. These methods should only be called after StartUpdating() has been
-  // called and before StopUpdating() is called.
+  // removal/renderer unresponsive. These methods should only be called after
+  // StartUpdating() has been called and before StopUpdating() is called.
   void NotifyObserverTaskAdded(Task* task) const;
   void NotifyObserverTaskRemoved(Task* task) const;
+  void NotifyObserverTaskUnresponsive(Task* task) const;
 
  private:
   // This will be called once an observer is set for this provider. When it is