Move state machines to state_machines subdir

third_party/WebKit/Source/core/editing/StateMachineCommon.cpp

+// Copyright 2016 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 "StateMachineCommon.h"
+
+#include "wtf/Assertions.h"
+#include <ostream> // NOLINT
+
+namespace blink {
+
+std::ostream& operator << (std::ostream& os, MachineState state)
+{
+    switch (state) {
+    case MachineState::Invalid:
+        os << "Invalid";
+        break;
+    case MachineState::NeedMoreCodeUnit:
+        os << "NeedMoreCodeUnit";
+        break;
+    case MachineState::NeedFollowingCodeUnit:
+        os << "NeedFollowingCodeUnit";
+        break;
+    case MachineState::Finished:
+        os << "Finished";
+        break;
+    default:
+        NOTREACHED(); // Please add once you add new state.
+    }
+    return os;
+}
+
+} // namespace blink