cc: Throttle swaps in Scheduler instead of OutputSurface

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 <string>
 #include <vector>
 
 #include "base/logging.h"
 #include "base/memory/scoped_vector.h"
@@ skipping 1238 matching lines @@
   scheduler->SetNeedsCommit();
   EXPECT_TRUE(scheduler->CommitPending());
   scheduler->NotifyBeginMainFrameStarted();
   scheduler->NotifyReadyToCommit();
   scheduler->SetNeedsRedraw();
   BeginFrameArgs impl_frame_args = BeginFrameArgs::CreateForTesting();
   const int interval = 1;
   impl_frame_args.interval = base::TimeDelta::FromMilliseconds(interval);
   scheduler->BeginImplFrame(impl_frame_args);
   scheduler->OnBeginImplFrameDeadline();
+  scheduler->DidSwapBuffers();
+  scheduler->OnSwapBuffersComplete();
 
   // At this point, we've drawn a frame.  Start another commit, but hold off on
   // the NotifyReadyToCommit for now.
   EXPECT_FALSE(scheduler->CommitPending());
+  scheduler->BeginImplFrame(impl_frame_args);
   scheduler->SetNeedsCommit();
   EXPECT_TRUE(scheduler->CommitPending());
 
+  // Draw and swap the frame, but don't ack the swap to simulate the Browser
+  // blocking on the renderer.
+  scheduler->OnBeginImplFrameDeadline();
+  scheduler->DidSwapBuffers();
+
   // Spin the event loop a few times and make sure we get more
   // DidAnticipateDrawTimeChange calls every time.
   int actions_so_far = client.num_actions_();
 
   // Does three iterations to make sure that the timer is properly repeating.
   for (int i = 0; i < 3; ++i) {
     // Wait for 2x the frame interval to match
     // Scheduler::advance_commit_state_timer_'s rate.
     SpinForMillis(interval * 2);
     EXPECT_GT(client.num_actions_(), actions_so_far);
     EXPECT_STREQ(client.Action(client.num_actions_() - 1),
                  "DidAnticipatedDrawTimeChange");
     actions_so_far = client.num_actions_();
   }
 }
 
 }  // namespace
 }  // namespace cc