Bug 1680544 - Part 1: Introduce a GetName member for Tasks and implement this for RunnableTask. r=smaug,nika

Differential Revision: https://phabricator.services.mozilla.com/D98644

xpcom/threads/TaskController.cpp

@@ -465,6 +465,16 @@ class RunnableTask : public Task {
     return nsThread::GetPerformanceCounterBase(mRunnable);
   }
 
+  virtual bool GetName(nsACString& aName) override {
+#ifdef MOZ_COLLECTING_RUNNABLE_TELEMETRY
+    nsThread::GetLabeledRunnableName(mRunnable, aName,
+                                     EventQueuePriority(GetPriority()));
+    return true;
+#else
+    return false;
+#endif
+  }
+
  private:
   RefPtr<nsIRunnable> mRunnable;
 };

xpcom/threads/TaskController.h

@@ -170,6 +170,9 @@ class Task {
 
   virtual PerformanceCounter* GetPerformanceCounter() const { return nullptr; }
 
+  // Get a name for this task. This returns false if the task has no name.
+  virtual bool GetName(nsACString& aName) { return false; }
+
  protected:
   Task(bool aMainThreadOnly,
        uint32_t aPriority = static_cast<uint32_t>(kDefaultPriorityValue))