Run task queue manager work in batches

content/renderer/scheduler/renderer_scheduler_impl_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/scheduler/renderer_scheduler_impl.h"
 
 #include "base/callback.h"
 #include "cc/output/begin_frame_args.h"
 #include "cc/test/ordered_simple_task_runner.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace content {
 
-class RendererSchedulerImplForTest : public RendererSchedulerImpl {
- public:
-  RendererSchedulerImplForTest(
-      scoped_refptr<cc::OrderedSimpleTaskRunner> task_runner,
-      scoped_refptr<cc::TestNowSource> clock)
-      : RendererSchedulerImpl(task_runner), clock_(clock) {}
-  ~RendererSchedulerImplForTest() override {}
-
- protected:
-  base::TimeTicks Now() const override { return clock_->Now(); }
-
- private:
-  scoped_refptr<cc::TestNowSource> clock_;
-};
-
 class RendererSchedulerImplTest : public testing::Test {
  public:
   RendererSchedulerImplTest()
       : clock_(cc::TestNowSource::Create(5000)),
         mock_task_runner_(new cc::OrderedSimpleTaskRunner(clock_, false)),
-        scheduler_(new RendererSchedulerImplForTest(mock_task_runner_, clock_)),
+        scheduler_(new RendererSchedulerImpl(mock_task_runner_)),
         default_task_runner_(scheduler_->DefaultTaskRunner()),
         compositor_task_runner_(scheduler_->CompositorTaskRunner()),
         loading_task_runner_(scheduler_->LoadingTaskRunner()),
-        idle_task_runner_(scheduler_->IdleTaskRunner()) {}
+        idle_task_runner_(scheduler_->IdleTaskRunner()) {
+    scheduler_->SetTimeSourceForTesting(clock_);
+  }
   ~RendererSchedulerImplTest() override {}
 
   void RunUntilIdle() { mock_task_runner_->RunUntilIdle(); }
 
   void EnableIdleTasks() {
     scheduler_->WillBeginFrame(cc::BeginFrameArgs::Create(
         BEGINFRAME_FROM_HERE, clock_->Now(), base::TimeTicks(),
         base::TimeDelta::FromMilliseconds(1000), cc::BeginFrameArgs::NORMAL));
     scheduler_->DidCommitFrameToCompositor();
   }
@@ skipping 488 matching lines @@
       FROM_HERE, base::Bind(&PostingYieldingTestTask, scheduler_.get(),
                             compositor_task_runner_, true, &should_yield_before,
                             &should_yield_after));
   RunUntilIdle();
   // We should be able to switch to compositor priority mid-task.
   EXPECT_FALSE(should_yield_before);
   EXPECT_TRUE(should_yield_after);
 }
 
 }  // namespace content