cc: Make BackToBackBeginFrameSource a SyntheticBeginFrameSource.

cc/scheduler/scheduler_unittest.cc

 // Copyright 2011 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 "cc/scheduler/scheduler.h"
 
 #include <stddef.h>
 
 #include <string>
 #include <vector>
@@ skipping 227 matching lines @@
     now_src_->Advance(base::TimeDelta::FromMilliseconds(100));
     // Fail if we need to run 100 tasks in a row.
     task_runner_->SetRunTaskLimit(100);
   }
 
   ~SchedulerTest() override {}
 
  protected:
   TestScheduler* CreateScheduler() {
     BeginFrameSource* frame_source;
-    unthrottled_frame_source_.reset(
-        new TestBackToBackBeginFrameSource(now_src_.get(), task_runner_.get()));
+    unthrottled_frame_source_.reset(new SyntheticBeginFrameSource(
+        base::MakeUnique<TestDelayBasedTimeSource>(now_src_.get(),
+                                                   task_runner_.get())));
+    unthrottled_frame_source_->SetUnthrottled(true);
     fake_external_begin_frame_source_.reset(
         new FakeExternalBeginFrameSource(client_.get()));
-    synthetic_frame_source_.reset(new TestSyntheticBeginFrameSource(
-        now_src_.get(), task_runner_.get(), BeginFrameArgs::DefaultInterval()));
+    synthetic_frame_source_.reset(new SyntheticBeginFrameSource(
+        base::MakeUnique<TestDelayBasedTimeSource>(now_src_.get(),
+                                                   task_runner_.get())));
     if (!scheduler_settings_.throttle_frame_production) {
       frame_source = unthrottled_frame_source_.get();
     } else if (scheduler_settings_.use_external_begin_frame_source) {
       frame_source = fake_external_begin_frame_source_.get();
     } else {
       frame_source = synthetic_frame_source_.get();
     }
 
     std::unique_ptr<FakeCompositorTimingHistory>
         fake_compositor_timing_history = FakeCompositorTimingHistory::Create(
@@ skipping 158 matching lines @@
       bool use_external_begin_frame_source,
       bool throttle_frame_production);
   bool BeginMainFrameOnCriticalPath(TreePriority tree_priority,
                                     ScrollHandlerState scroll_handler_state,
                                     base::TimeDelta durations);
 
   std::unique_ptr<base::SimpleTestTickClock> now_src_;
   scoped_refptr<OrderedSimpleTaskRunner> task_runner_;
   std::unique_ptr<FakeExternalBeginFrameSource>
       fake_external_begin_frame_source_;
-  std::unique_ptr<TestSyntheticBeginFrameSource> synthetic_frame_source_;
-  std::unique_ptr<TestBackToBackBeginFrameSource> unthrottled_frame_source_;
+  std::unique_ptr<SyntheticBeginFrameSource> synthetic_frame_source_;
+  std::unique_ptr<SyntheticBeginFrameSource> unthrottled_frame_source_;
   SchedulerSettings scheduler_settings_;
   std::unique_ptr<FakeSchedulerClient> client_;
   std::unique_ptr<TestScheduler> scheduler_;
   FakeCompositorTimingHistory* fake_compositor_timing_history_;
 };
 
 TEST_F(SchedulerTest, InitializeOutputSurfaceDoesNotBeginImplFrame) {
   scheduler_settings_.use_external_begin_frame_source = true;
   SetUpScheduler(false);
   scheduler_->SetVisible(true);
@@ skipping 3251 matching lines @@
 }
 
 TEST_F(SchedulerTest, BeginMainFrameOnCriticalPath_AHS) {
   EXPECT_FALSE(BeginMainFrameOnCriticalPath(
       SMOOTHNESS_TAKES_PRIORITY,
       ScrollHandlerState::SCROLL_AFFECTS_SCROLL_HANDLER, kSlowDuration));
 }
 
 }  // namespace
 }  // namespace cc