[scheduler] Add WakeupBudgetPool.

third_party/WebKit/Source/platform/scheduler/base/task_queue_impl.cc

Index: third_party/WebKit/Source/platform/scheduler/base/task_queue_impl.cc
diff --git a/third_party/WebKit/Source/platform/scheduler/base/task_queue_impl.cc b/third_party/WebKit/Source/platform/scheduler/base/task_queue_impl.cc
index c1545520ab9df637cbba40596e322fb09a910f6a..7d7505946a36ed42763fc7b56e711be4e3063762 100644
--- a/third_party/WebKit/Source/platform/scheduler/base/task_queue_impl.cc
+++ b/third_party/WebKit/Source/platform/scheduler/base/task_queue_impl.cc
@@ -6,6 +6,8 @@
 
 #include <utility>
 
+#include <iostream>  // FIXME
+
 #include "base/format_macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/stringprintf.h"
@@ -696,6 +698,10 @@ bool TaskQueueImpl::BlockedByFence() const {
          main_thread_only().current_fence;
 }
 
+bool TaskQueueImpl::HasFence() const {
+  return !!main_thread_only().current_fence;
+}
+
 bool TaskQueueImpl::CouldTaskRun(EnqueueOrder enqueue_order) const {
   if (!IsQueueEnabled())
     return false;