Remove runtime toggling of throttling frames

cc/scheduler/scheduler_unittest.cc

Index: cc/scheduler/scheduler_unittest.cc
diff --git a/cc/scheduler/scheduler_unittest.cc b/cc/scheduler/scheduler_unittest.cc
index 37fa8e0a6c9b56e3503b55ec3327822d5e37a8c0..d515648bdb476bfd0417e739a7e55ec769c517c1 100644
--- a/cc/scheduler/scheduler_unittest.cc
+++ b/cc/scheduler/scheduler_unittest.cc
@@ -3042,120 +3042,6 @@ TEST_F(SchedulerTest, ScheduledActionActivateAfterBeginFrameSourcePaused) {
   EXPECT_SINGLE_ACTION("ScheduledActionActivateSyncTree", client_);
 }
 
-// Tests to ensure frame sources can be successfully changed while drawing.
-TEST_F(SchedulerTest, SwitchFrameSourceToUnthrottled) {
-  scheduler_settings_.use_external_begin_frame_source = true;
-  SetUpScheduler(true);
-
-  // SetNeedsRedraw should begin the frame on the next BeginImplFrame.
-  scheduler_->SetNeedsRedraw();
-  EXPECT_SINGLE_ACTION("AddObserver(this)", client_);
-  client_->Reset();
-
-  EXPECT_SCOPED(AdvanceFrame());
-  EXPECT_ACTION("WillBeginImplFrame", client_, 0, 1);
-  EXPECT_TRUE(scheduler_->BeginImplFrameDeadlinePending());
-  EXPECT_TRUE(scheduler_->begin_frames_expected());
-  client_->Reset();
-  task_runner().RunPendingTasks();  // Run posted deadline.
-  EXPECT_ACTION("ScheduledActionDrawAndSwapIfPossible", client_, 0, 1);
-  scheduler_->SetNeedsRedraw();
-
-  // Switch to an unthrottled frame source.
-  scheduler_->SetThrottleFrameProduction(false);
-  client_->Reset();
-
-  // Unthrottled frame source will immediately begin a new frame.
-  task_runner().RunPendingTasks();  // Run posted BeginFrame.
-  EXPECT_ACTION("WillBeginImplFrame", client_, 0, 1);
-  EXPECT_TRUE(scheduler_->BeginImplFrameDeadlinePending());
-  client_->Reset();
-
-  // If we don't swap on the deadline, we wait for the next BeginFrame.
-  task_runner().RunPendingTasks();  // Run posted deadline.
-  EXPECT_ACTION("ScheduledActionDrawAndSwapIfPossible", client_, 0, 1);
-  EXPECT_FALSE(scheduler_->BeginImplFrameDeadlinePending());
-  client_->Reset();
-}
-
-// Tests to ensure frame sources can be successfully changed while a frame
-// deadline is pending.
-TEST_F(SchedulerTest, SwitchFrameSourceToUnthrottledBeforeDeadline) {
-  scheduler_settings_.use_external_begin_frame_source = true;
-  SetUpScheduler(true);
-
-  // SetNeedsRedraw should begin the frame on the next BeginImplFrame.
-  scheduler_->SetNeedsRedraw();
-  EXPECT_SINGLE_ACTION("AddObserver(this)", client_);
-  client_->Reset();
-
-  EXPECT_SCOPED(AdvanceFrame());
-  EXPECT_SINGLE_ACTION("WillBeginImplFrame", client_);
-
-  // Switch to an unthrottled frame source before the frame deadline is hit.
-  scheduler_->SetThrottleFrameProduction(false);
-  client_->Reset();
-
-  EXPECT_TRUE(scheduler_->BeginImplFrameDeadlinePending());
-  EXPECT_TRUE(scheduler_->begin_frames_expected());
-  client_->Reset();
-
-  task_runner().RunPendingTasks();  // Run posted deadline.
-  EXPECT_SINGLE_ACTION("ScheduledActionDrawAndSwapIfPossible", client_);
-  client_->Reset();
-
-  // Unthrottled frame source will immediately begin a new frame.
-  task_runner().RunPendingTasks();  // Run BeginFrame.
-  EXPECT_SINGLE_ACTION("WillBeginImplFrame", client_);
-  scheduler_->SetNeedsRedraw();
-  client_->Reset();
-
-  task_runner().RunPendingTasks();  // Run posted deadline.
-  EXPECT_SINGLE_ACTION("ScheduledActionDrawAndSwapIfPossible", client_);
-  EXPECT_FALSE(scheduler_->BeginImplFrameDeadlinePending());
-  client_->Reset();
-}
-
-// Tests to ensure that the active frame source can successfully be changed from
-// unthrottled to throttled.
-TEST_F(SchedulerTest, SwitchFrameSourceToThrottled) {
-  scheduler_settings_.throttle_frame_production = false;
-  scheduler_settings_.use_external_begin_frame_source = true;
-  SetUpScheduler(true);
-
-  scheduler_->SetNeedsRedraw();
-  EXPECT_NO_ACTION(client_);
-  client_->Reset();
-
-  task_runner().RunPendingTasks();  // Run posted BeginFrame.
-  EXPECT_ACTION("WillBeginImplFrame", client_, 0, 1);
-  EXPECT_TRUE(scheduler_->BeginImplFrameDeadlinePending());
-  client_->Reset();
-
-  task_runner().RunPendingTasks();  // Run posted deadline.
-  EXPECT_ACTION("ScheduledActionDrawAndSwapIfPossible", client_, 0, 1);
-  EXPECT_FALSE(scheduler_->BeginImplFrameDeadlinePending());
-  client_->Reset();
-
-  // Switch to a throttled frame source.
-  scheduler_->SetThrottleFrameProduction(true);
-  client_->Reset();
-
-  // SetNeedsRedraw should begin the frame on the next BeginImplFrame.
-  scheduler_->SetNeedsRedraw();
-  task_runner().RunPendingTasks();
-  EXPECT_NO_ACTION(client_);
-  client_->Reset();
-
-  EXPECT_SCOPED(AdvanceFrame());
-  EXPECT_ACTION("WillBeginImplFrame", client_, 0, 1);
-  EXPECT_TRUE(scheduler_->BeginImplFrameDeadlinePending());
-  EXPECT_TRUE(scheduler_->begin_frames_expected());
-  client_->Reset();
-  task_runner().RunPendingTasks();  // Run posted deadline.
-  EXPECT_ACTION("ScheduledActionDrawAndSwapIfPossible", client_, 0, 1);
-}
-
 // Tests to ensure that we send a BeginMainFrameNotExpectedSoon when expected.
 TEST_F(SchedulerTest, SendBeginMainFrameNotExpectedSoon) {
   scheduler_settings_.use_external_begin_frame_source = true;