cc: Fix disabled vsync state freezing

cc/scheduler/scheduler.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 <algorithm>
 #include "base/auto_reset.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
@@ skipping 139 matching lines @@
 
   if (should_call_set_needs_begin_frame) {
     client_->SetNeedsBeginFrameOnImplThread(needs_begin_frame);
     last_set_needs_begin_frame_ = needs_begin_frame;
   }
 
   // Setup PollForAnticipatedDrawTriggers if we need to monitor state but
   // aren't expecting any more BeginFrames. This should only be needed by the
   // synchronous compositor when BeginFrameNeededByImplThread is false.
   if (state_machine_.ShouldPollForAnticipatedDrawTriggers()) {
-    DCHECK(settings_.using_synchronous_renderer_compositor);
+    DCHECK(!state_machine_.SupportsProactiveBeginFrame());
     DCHECK(!needs_begin_frame);
     if (poll_for_draw_triggers_closure_.IsCancelled()) {
       poll_for_draw_triggers_closure_.Reset(
           base::Bind(&Scheduler::PollForAnticipatedDrawTriggers,
                      weak_factory_.GetWeakPtr()));
       base::MessageLoop::current()->PostDelayedTask(
           FROM_HERE,
           poll_for_draw_triggers_closure_.callback(),
           last_begin_frame_args_.interval);
     }
@@ skipping 159 matching lines @@
 
   SetupNextBeginFrameIfNeeded();
   client_->DidAnticipatedDrawTimeChange(AnticipatedDrawTime());
 }
 
 bool Scheduler::WillDrawIfNeeded() const {
   return !state_machine_.PendingDrawsShouldBeAborted();
 }
 
 }  // namespace cc