[TaskManager] Allow a Task to mutate its PID after creation

chrome/browser/task_manager/providers/task_provider.cc

Index: chrome/browser/task_manager/providers/task_provider.cc
diff --git a/chrome/browser/task_manager/providers/task_provider.cc b/chrome/browser/task_manager/providers/task_provider.cc
index 9f309aa5a599f31e5618b83a51c2e19b004ec39b..491cee42c3847ab68a66e48d1a4934bc1eb01ff1 100644
--- a/chrome/browser/task_manager/providers/task_provider.cc
+++ b/chrome/browser/task_manager/providers/task_provider.cc
@@ -41,4 +41,13 @@ void TaskProvider::NotifyObserverTaskUnresponsive(Task* task) const {
   observer_->TaskUnresponsive(task);
 }
 
+void TaskProvider::UpdateTaskProcessInfoAndNotifyObserver(
+    Task* existing_task,
+    base::ProcessHandle new_process_handle,
+    base::ProcessId new_process_id) const {
+  DCHECK(observer_);
+  existing_task->UpdateProcessInfo(new_process_handle, new_process_id,
+                                   observer_);
+}
+
 }  // namespace task_manager