cc: Make animations tick regardless of drawing.

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 "base/auto_reset.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 
@@ skipping 181 matching lines @@
         break;
     }
     action = state_machine_.NextAction();
   }
 
   // Activate or deactivate the frame rate controller.
   frame_rate_controller_->SetActive(state_machine_.VSyncCallbackNeeded());
   client_->DidAnticipatedDrawTimeChange(frame_rate_controller_->NextTickTime());
 }
 
+bool Scheduler::WillDrawIfNeeded() const {
+  return !state_machine_.DrawSuspendedUntilCommit();
+}
+
 }  // namespace cc