Rename the PolicyManager to UpdateManager.

This change renames the PolicyManager class, directory, tests, etc,
to avoid confusion with libpolicy and its classes.

BUG=chromium:373551
TEST=emerged on link.
CQ-DEPEND=CL:I43081673c7ba409f02273197da7915537bde39c6

Change-Id: Iffa76caa3b95ecbbdba87ab01006d1d8ce35a27f
Reviewed-on: https://chromium-review.googlesource.com/201876
Tested-by: Alex Deymo <deymo@chromium.org>
Reviewed-by: David Zeuthen <zeuthen@chromium.org>
Commit-Queue: Alex Deymo <deymo@chromium.org>
diff --git a/update_manager/state.h b/update_manager/state.h
new file mode 100644
index 0000000..0fe4116
--- /dev/null
+++ b/update_manager/state.h
@@ -0,0 +1,42 @@
+// Copyright (c) 2014 The Chromium OS 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 CHROMEOS_PLATFORM_UPDATE_ENGINE_UPDATE_MANAGER_STATE_H_
+#define CHROMEOS_PLATFORM_UPDATE_ENGINE_UPDATE_MANAGER_STATE_H_
+
+#include "update_engine/update_manager/config_provider.h"
+#include "update_engine/update_manager/device_policy_provider.h"
+#include "update_engine/update_manager/random_provider.h"
+#include "update_engine/update_manager/shill_provider.h"
+#include "update_engine/update_manager/system_provider.h"
+#include "update_engine/update_manager/time_provider.h"
+#include "update_engine/update_manager/updater_provider.h"
+
+namespace chromeos_update_manager {
+
+// The State class is an interface to the ensemble of providers. This class
+// gives visibility of the state providers to policy implementations.
+class State {
+ public:
+  virtual ~State() {}
+
+  // These methods return the given provider.
+  virtual ConfigProvider* config_provider() = 0;
+  virtual DevicePolicyProvider* device_policy_provider() = 0;
+  virtual RandomProvider* random_provider() = 0;
+  virtual ShillProvider* shill_provider() = 0;
+  virtual SystemProvider* system_provider() = 0;
+  virtual TimeProvider* time_provider() = 0;
+  virtual UpdaterProvider* updater_provider() = 0;
+
+ protected:
+  State() {}
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(State);
+};
+
+}  // namespace chromeos_update_manager
+
+#endif  // CHROMEOS_PLATFORM_UPDATE_ENGINE_UPDATE_MANAGER_STATE_H_