Schedule bitmap animation timers on the compositor task runner.

third_party/WebKit/Source/platform/scheduler/renderer/renderer_web_scheduler_impl.cc

Index: third_party/WebKit/Source/platform/scheduler/renderer/renderer_web_scheduler_impl.cc
diff --git a/third_party/WebKit/Source/platform/scheduler/renderer/renderer_web_scheduler_impl.cc b/third_party/WebKit/Source/platform/scheduler/renderer/renderer_web_scheduler_impl.cc
index 475d6c5fb796d062a5240cf35c70fbee60e9fcf5..7f24d99060d5154256a7659dac18146eea7067ba 100644
--- a/third_party/WebKit/Source/platform/scheduler/renderer/renderer_web_scheduler_impl.cc
+++ b/third_party/WebKit/Source/platform/scheduler/renderer/renderer_web_scheduler_impl.cc
@@ -21,10 +21,16 @@ RendererWebSchedulerImpl::RendererWebSchedulerImpl(
                        renderer_scheduler->IdleTaskRunner(),
                        renderer_scheduler->LoadingTaskQueue(),
                        renderer_scheduler->TimerTaskQueue()),
-      renderer_scheduler_(renderer_scheduler) {}
+      renderer_scheduler_(renderer_scheduler),
+      compositor_task_runner_(WebTaskRunnerImpl::Create(
+          renderer_scheduler_->CompositorTaskQueue())) {}
 
 RendererWebSchedulerImpl::~RendererWebSchedulerImpl() {}
 
+WebTaskRunner* RendererWebSchedulerImpl::CompositorTaskRunner() {
+  return compositor_task_runner_.Get();
+}
+
 void RendererWebSchedulerImpl::SuspendTimerQueue() {
   renderer_scheduler_->SuspendTimerQueue();
 }