Move VISUAL_STATE promise to activation

cc/output/promise_list.h

Index: cc/output/promise_list.h
diff --git a/cc/output/promise_list.h b/cc/output/promise_list.h
new file mode 100644
index 0000000000000000000000000000000000000000..a975c729542bb0417dc9fcf912aa0463fc77a9e6
--- /dev/null
+++ b/cc/output/promise_list.h
@@ -0,0 +1,38 @@
+// Copyright 2015 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.
+
+#ifndef CC_OUTPUT_PROMISE_LIST_H_
+#define CC_OUTPUT_PROMISE_LIST_H_
+
+#include "cc/base/scoped_ptr_vector.h"
+#include "cc/output/promise.h"
+
+namespace cc {
+
+class CC_EXPORT PromiseList {
+ public:
+  PromiseList();
+  ~PromiseList();
+
+  void QueuePromise(scoped_ptr<Promise>);
+  void TakePromises(PromiseList*);
+  void PassPromises(PromiseList*);
+
+  void OnDidSwap(CompositorFrameMetadata* metadata);
+  void OnDidNotSwap(Promise::DidNotSwap::Reason reason);
+
+  void OnDidActivate(CompositorFrameMetadata* metadata);
+  void OnDidNotActivate(Promise::DidNotActivate::Reason reason);
+
+  size_t size() const { return promises_.size(); }
+
+  void GetTraceIds(std::vector<int64>* trace_ids) const;
+
+ private:
+  ScopedPtrVector<Promise> promises_;
+};
+
+}  // namespace cc
+
+#endif  // CC_OUTPUT_PROMISE_LIST_H_