Move VISUAL_STATE promise to activation

cc/output/promise.h

Index: cc/output/promise.h
diff --git a/cc/output/promise.h b/cc/output/promise.h
new file mode 100644
index 0000000000000000000000000000000000000000..61bf537bc47b192d0f6d3aa249fa3830de9ba745
--- /dev/null
+++ b/cc/output/promise.h
@@ -0,0 +1,50 @@
+// 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_H_
+#define CC_OUTPUT_PROMISE_H_
+
+#include "base/basictypes.h"
+#include "cc/base/cc_export.h"
+#include "cc/output/compositor_frame_metadata.h"
+
+namespace cc {
+
+class CC_EXPORT Promise {
+ public:
+  struct DidNotSwap {
+    enum Reason {
+      UNKNOWN,
+      SWAP_FAILS,
+      COMMIT_FAILS,
+      COMMIT_NO_UPDATE,
+    };
+  };
+  struct DidNotActivate {
+    enum Reason {
+      UNKNOWN,
+      ACTIVATION_FAILS,
+      COMMIT_NO_UPDATE,
+      COMMIT_FAILS,
+    };
+  };
+
+  Promise() {}
+  virtual ~Promise();
+
+  virtual bool OnDidSwap(CompositorFrameMetadata*);
+  virtual bool OnDidNotSwap(DidNotSwap::Reason);
+
+  virtual bool OnDidActivate(CompositorFrameMetadata*);
+  virtual bool OnDidNotActivate(DidNotActivate::Reason);
+
+  // A non-zero trace id identifies a trace flow object that is embedded in the
+  // swap promise. This can be used for registering additional flow steps to
+  // visualize the object's path through the system.
+  virtual int64 TraceId() const = 0;
+};
+
+}  // namespace cc
+
+#endif  // CC_OUTPUT_PROMISE_H_