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

third_party/WebKit/Source/platform/scheduler/child/compositor_worker_scheduler.cc

Index: third_party/WebKit/Source/platform/scheduler/child/compositor_worker_scheduler.cc
diff --git a/third_party/WebKit/Source/platform/scheduler/child/compositor_worker_scheduler.cc b/third_party/WebKit/Source/platform/scheduler/child/compositor_worker_scheduler.cc
index dbfc73ef79be4c1ca44deb429f80fb8e79036f1d..2aa0a91b73ee5c5e63c2df22dfad0c2a2f6ad364 100644
--- a/third_party/WebKit/Source/platform/scheduler/child/compositor_worker_scheduler.cc
+++ b/third_party/WebKit/Source/platform/scheduler/child/compositor_worker_scheduler.cc
@@ -9,6 +9,7 @@
 #include "base/callback.h"
 #include "base/message_loop/message_loop.h"
 #include "base/threading/thread.h"
+#include "platform/scheduler/base/task_queue.h"
 
 namespace blink {
 namespace scheduler {
@@ -133,13 +134,18 @@ CompositorWorkerScheduler::~CompositorWorkerScheduler() {}
 
 void CompositorWorkerScheduler::Init() {}
 
-scoped_refptr<TaskQueue> CompositorWorkerScheduler::DefaultTaskRunner() {
+scoped_refptr<TaskQueue> CompositorWorkerScheduler::DefaultTaskQueue() {
   // TODO(sad): Implement a more robust scheduler that can do idle tasks for GC
   // without regressing performance of the rest of the system.
   return make_scoped_refptr(
       new CompositorWorkerTaskRunnerWrapper(thread_->task_runner()));
 }
 
+scoped_refptr<base::SingleThreadTaskRunner>
+CompositorWorkerScheduler::DefaultTaskRunner() {
+  return DefaultTaskQueue();
+}
+
 scoped_refptr<scheduler::SingleThreadIdleTaskRunner>
 CompositorWorkerScheduler::IdleTaskRunner() {
   // TODO(flackr): This posts idle tasks as regular tasks. We need to create