Plumb activation time to main

third_party/WebKit/Source/platform/scheduler/renderer/renderer_scheduler_impl.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 "platform/scheduler/renderer/renderer_scheduler_impl.h"
 
 #include "base/bind.h"
 #include "base/debug/stack_trace.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
@@ skipping 387 matching lines @@
   helper_.RemoveTaskObserver(task_observer);
 }
 
 void RendererSchedulerImpl::WillBeginFrame(const cc::BeginFrameArgs& args) {
   TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("renderer.scheduler"),
                "RendererSchedulerImpl::WillBeginFrame", "args", args.AsValue());
   helper_.CheckOnValidThread();
   if (helper_.IsShutdown())
     return;
 
+  fprintf(stderr,
+          "\nRendererSchedulerImpl::WillBeginFrame: current frame: %d, "
+          "activated frame: %d",
+          args.frame_source_number, args.ready_to_activate_source_frame_number);
+
   EndIdlePeriod();
   MainThreadOnly().estimated_next_frame_begin = args.frame_time + args.interval;
   MainThreadOnly().have_seen_a_begin_main_frame = true;
   MainThreadOnly().begin_frame_not_expected_soon = false;
   MainThreadOnly().compositor_frame_interval = args.interval;
   {
     base::AutoLock lock(any_thread_lock_);
     AnyThread().begin_main_frame_on_critical_path = args.on_critical_path;
   }
 }
@@ skipping 1495 matching lines @@
     case TimeDomainType::VIRTUAL:
       return "virtual";
     default:
       NOTREACHED();
       return nullptr;
   }
 }
 
 }  // namespace scheduler
 }  // namespace blink