Revert of [scheduler] Split suspendable tq from unthrottled tq.

third_party/WebKit/Source/core/loader/EmptyClients.cpp

Index: third_party/WebKit/Source/core/loader/EmptyClients.cpp
diff --git a/third_party/WebKit/Source/core/loader/EmptyClients.cpp b/third_party/WebKit/Source/core/loader/EmptyClients.cpp
index fb85a1932fa052ffb2ba5a0492ed51daff8f4964..0a7bb3fc802df4bde36fc93b9cdda3d59510a34f 100644
--- a/third_party/WebKit/Source/core/loader/EmptyClients.cpp
+++ b/third_party/WebKit/Source/core/loader/EmptyClients.cpp
@@ -76,7 +76,6 @@
   RefPtr<WebTaskRunner> loadingTaskRunner() override;
   RefPtr<WebTaskRunner> timerTaskRunner() override;
   RefPtr<WebTaskRunner> unthrottledTaskRunner() override;
-  RefPtr<WebTaskRunner> suspendableTaskRunner() override;
 };
 
 RefPtr<WebTaskRunner> EmptyFrameScheduler::loadingTaskRunner() {
@@ -88,10 +87,6 @@
 }
 
 RefPtr<WebTaskRunner> EmptyFrameScheduler::unthrottledTaskRunner() {
-  return Platform::current()->mainThread()->getWebTaskRunner();
-}
-
-RefPtr<WebTaskRunner> EmptyFrameScheduler::suspendableTaskRunner() {
   return Platform::current()->mainThread()->getWebTaskRunner();
 }