[scheduler] Remove blink::scheduler::TaskQueue from public API.

third_party/WebKit/Source/platform/scheduler/test/fake_renderer_scheduler.cc

Index: third_party/WebKit/Source/platform/scheduler/test/fake_renderer_scheduler.cc
diff --git a/third_party/WebKit/Source/platform/scheduler/test/fake_renderer_scheduler.cc b/third_party/WebKit/Source/platform/scheduler/test/fake_renderer_scheduler.cc
index 633fccc840bb0d201cd98570e24df58ffbc77a03..21322e8460d51befa9a1277e8353f0f085948132 100644
--- a/third_party/WebKit/Source/platform/scheduler/test/fake_renderer_scheduler.cc
+++ b/third_party/WebKit/Source/platform/scheduler/test/fake_renderer_scheduler.cc
@@ -17,15 +17,18 @@ std::unique_ptr<blink::WebThread> FakeRendererScheduler::CreateMainThread() {
   return nullptr;
 }
 
-scoped_refptr<TaskQueue> FakeRendererScheduler::DefaultTaskRunner() {
+scoped_refptr<base::SingleThreadTaskRunner>
+FakeRendererScheduler::DefaultTaskRunner() {
   return nullptr;
 }
 
-scoped_refptr<TaskQueue> FakeRendererScheduler::CompositorTaskRunner() {
+scoped_refptr<base::SingleThreadTaskRunner>
+FakeRendererScheduler::CompositorTaskRunner() {
   return nullptr;
 }
 
-scoped_refptr<TaskQueue> FakeRendererScheduler::LoadingTaskRunner() {
+scoped_refptr<base::SingleThreadTaskRunner>
+FakeRendererScheduler::LoadingTaskRunner() {
   return nullptr;
 }
 
@@ -34,22 +37,8 @@ FakeRendererScheduler::IdleTaskRunner() {
   return nullptr;
 }
 
-scoped_refptr<TaskQueue> FakeRendererScheduler::TimerTaskRunner() {
-  return nullptr;
-}
-
-scoped_refptr<TaskQueue> FakeRendererScheduler::NewLoadingTaskRunner(
-    TaskQueue::QueueType queue_type) {
-  return nullptr;
-}
-
-scoped_refptr<TaskQueue> FakeRendererScheduler::NewTimerTaskRunner(
-    TaskQueue::QueueType queue_type) {
-  return nullptr;
-}
-
-scoped_refptr<TaskQueue> FakeRendererScheduler::NewUnthrottledTaskRunner(
-    TaskQueue::QueueType queue_type) {
+scoped_refptr<base::SingleThreadTaskRunner>
+FakeRendererScheduler::TimerTaskRunner() {
   return nullptr;
 }