Adds a flag to support "Virtual Time" to the blink scheduler

components/scheduler/child/scheduler_helper_unittest.cc

Index: components/scheduler/child/scheduler_helper_unittest.cc
diff --git a/components/scheduler/child/scheduler_helper_unittest.cc b/components/scheduler/child/scheduler_helper_unittest.cc
index 5d75bb28790913a8021e2dd24b4271ccbba42b1c..f2d60cf9d13c01c69b2a982f67afe68d5ace4b97 100644
--- a/components/scheduler/child/scheduler_helper_unittest.cc
+++ b/components/scheduler/child/scheduler_helper_unittest.cc
@@ -9,7 +9,7 @@
 #include "cc/test/ordered_simple_task_runner.h"
 #include "components/scheduler/base/task_queue.h"
 #include "components/scheduler/base/test_time_source.h"
-#include "components/scheduler/child/scheduler_task_runner_delegate_for_test.h"
+#include "components/scheduler/child/scheduler_tqm_delegate_for_test.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -46,8 +46,9 @@ class SchedulerHelperTest : public testing::Test {
   SchedulerHelperTest()
       : clock_(new base::SimpleTestTickClock()),
         mock_task_runner_(new cc::OrderedSimpleTaskRunner(clock_.get(), false)),
-        main_task_runner_(
-            SchedulerTaskRunnerDelegateForTest::Create(mock_task_runner_)),
+        main_task_runner_(SchedulerTqmDelegateForTest::Create(
+            mock_task_runner_,
+            make_scoped_ptr(new TestTimeSource(clock_.get())))),
         scheduler_helper_(new SchedulerHelper(
             main_task_runner_,
             "test.scheduler",
@@ -55,10 +56,6 @@ class SchedulerHelperTest : public testing::Test {
             TRACE_DISABLED_BY_DEFAULT("test.scheduler.dbg"))),
         default_task_runner_(scheduler_helper_->DefaultTaskRunner()) {
     clock_->Advance(base::TimeDelta::FromMicroseconds(5000));
-    scheduler_helper_->SetTimeSourceForTesting(
-        make_scoped_ptr(new TestTimeSource(clock_.get())));
-    scheduler_helper_->GetTaskQueueManagerForTesting()->SetTimeSourceForTesting(
-        make_scoped_ptr(new TestTimeSource(clock_.get())));
   }
 
   ~SchedulerHelperTest() override {}
@@ -86,7 +83,7 @@ class SchedulerHelperTest : public testing::Test {
   scoped_ptr<base::SimpleTestTickClock> clock_;
   scoped_refptr<cc::OrderedSimpleTaskRunner> mock_task_runner_;
 
-  scoped_refptr<SchedulerTaskRunnerDelegateForTest> main_task_runner_;
+  scoped_refptr<SchedulerTqmDelegateForTest> main_task_runner_;
   scoped_ptr<SchedulerHelper> scheduler_helper_;
   scoped_refptr<base::SingleThreadTaskRunner> default_task_runner_;