[DO NOT COMMIT] Set ServiceWorker initiated task highest priority

third_party/WebKit/Source/platform/WebFrameScheduler.h

Index: third_party/WebKit/Source/platform/WebFrameScheduler.h
diff --git a/third_party/WebKit/Source/platform/WebFrameScheduler.h b/third_party/WebKit/Source/platform/WebFrameScheduler.h
index 069fedf6b2bbc6dd2eac8d1e6ed62e3edc2c383f..80f93351bfa77f0251b979f5d7b165d65608b9b0 100644
--- a/third_party/WebKit/Source/platform/WebFrameScheduler.h
+++ b/third_party/WebKit/Source/platform/WebFrameScheduler.h
@@ -67,6 +67,9 @@ class WebFrameScheduler {
   // Tells the scheduler that the first meaningful paint has occured for this
   // frame.
   virtual void onFirstMeaningfulPaint() {}
+
+  // DO NOT COMMIT.
+  virtual void setMaximumPriorityForLabTest() {}
 };
 
 }  // namespace blink