cc: Introduce forward_begin_frames_to_children and use_external_begin_frame_source

cc/trees/layer_tree_host_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/trees/layer_tree_host.h"
 
 #include <algorithm>
 
 #include "base/auto_reset.h"
 #include "base/synchronization/lock.h"
@@ skipping 2358 matching lines @@
  private:
   NotificationClient client_;
 };
 
 SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostTestLCDNotification);
 
 // Verify that the BeginFrame notification is used to initiate rendering.
 class LayerTreeHostTestBeginFrameNotification : public LayerTreeHostTest {
  public:
   void InitializeSettings(LayerTreeSettings* settings) override {
-    settings->begin_frame_scheduling_enabled = true;
+    settings->use_external_begin_frame_source = true;
   }
 
   void BeginTest() override {
     // This will trigger a SetNeedsBeginFrame which will trigger a
     // BeginFrame.
     PostSetNeedsCommitToMainThread();
   }
 
   DrawResult PrepareToDrawOnThread(LayerTreeHostImpl* host_impl,
                                    LayerTreeHostImpl::FrameData* frame,
                                    DrawResult draw_result) override {
     EndTest();
     return DRAW_SUCCESS;
   }
 
   void AfterTest() override {}
 
  private:
   base::TimeTicks frame_time_;
 };
 
 MULTI_THREAD_TEST_F(LayerTreeHostTestBeginFrameNotification);
 
 class LayerTreeHostTestBeginFrameNotificationShutdownWhileEnabled
     : public LayerTreeHostTest {
  public:
   void InitializeSettings(LayerTreeSettings* settings) override {
-    settings->begin_frame_scheduling_enabled = true;
+    settings->use_external_begin_frame_source = true;
     settings->using_synchronous_renderer_compositor = true;
   }
 
   void BeginTest() override { PostSetNeedsCommitToMainThread(); }
 
   void CommitCompleteOnThread(LayerTreeHostImpl* host_impl) override {
     // The BeginFrame notification is turned off now but will get enabled
     // once we return. End test while it's enabled.
     ImplThreadTaskRunner()->PostTask(
         FROM_HERE,
         base::Bind(&LayerTreeHostTestBeginFrameNotification::EndTest,
                    base::Unretained(this)));
   }
 
   void AfterTest() override {}
 };
 
 MULTI_THREAD_TEST_F(
     LayerTreeHostTestBeginFrameNotificationShutdownWhileEnabled);
 
 class LayerTreeHostTestAbortedCommitDoesntStall : public LayerTreeHostTest {
  protected:
   LayerTreeHostTestAbortedCommitDoesntStall()
       : commit_count_(0), commit_abort_count_(0), commit_complete_count_(0) {}
 
   void InitializeSettings(LayerTreeSettings* settings) override {
-    settings->begin_frame_scheduling_enabled = true;
+    settings->use_external_begin_frame_source = true;
   }
 
   void BeginTest() override { PostSetNeedsCommitToMainThread(); }
 
   void DidCommit() override {
     commit_count_++;
     if (commit_count_ == 4) {
       // After two aborted commits, request a real commit now to make sure a
       // real commit following an aborted commit will still complete and
       // end the test even when the Impl thread is idle.
@@ skipping 2903 matching lines @@
   void AfterTest() override {
     EXPECT_TRUE(deltas_sent_to_client_);
   }
 
   ScrollAndScaleSet info_;
   bool deltas_sent_to_client_;
 };
 
 MULTI_THREAD_TEST_F(LayerTreeHostAcceptsDeltasFromImplWithoutRootLayer);
 }  // namespace cc