Worker: Introduce per-global-scope task scheduler

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

Index: third_party/WebKit/Source/platform/scheduler/child/webthread_base.cc
diff --git a/third_party/WebKit/Source/platform/scheduler/child/webthread_base.cc b/third_party/WebKit/Source/platform/scheduler/child/webthread_base.cc
index b23c54cf5318e20c15bbbab346cdbeb9d86f9efc..34b1d1a738b2c8ea70600d9c65008c3ce4c0eb29 100644
--- a/third_party/WebKit/Source/platform/scheduler/child/webthread_base.cc
+++ b/third_party/WebKit/Source/platform/scheduler/child/webthread_base.cc
@@ -13,6 +13,7 @@
 #include "base/pending_task.h"
 #include "base/threading/platform_thread.h"
 #include "platform/scheduler/child/compositor_worker_scheduler.h"
+#include "platform/scheduler/child/scheduler_tqm_delegate_impl.h"
 #include "platform/scheduler/child/webthread_impl_for_worker_scheduler.h"
 #include "public/platform/WebTraceLocation.h"
 #include "public/platform/scheduler/child/single_thread_idle_task_runner.h"
@@ -116,7 +117,8 @@ class WebThreadForCompositor : public WebThreadImplForWorkerScheduler {
   // WebThreadImplForWorkerScheduler:
   std::unique_ptr<blink::scheduler::WorkerScheduler> CreateWorkerScheduler()
       override {
-    return base::MakeUnique<CompositorWorkerScheduler>(GetThread());
+    return base::MakeUnique<CompositorWorkerScheduler>(GetThread(),
+                                                       task_runner_delegate());
   }
 
   DISALLOW_COPY_AND_ASSIGN(WebThreadForCompositor);