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/shill_provider.h b/update_manager/shill_provider.h
new file mode 100644
index 0000000..51180fa
--- /dev/null
+++ b/update_manager/shill_provider.h
@@ -0,0 +1,60 @@
+// 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_SHILL_PROVIDER_H_
+#define CHROMEOS_PLATFORM_UPDATE_ENGINE_UPDATE_MANAGER_SHILL_PROVIDER_H_
+
+#include <base/time/time.h>
+
+#include "update_engine/update_manager/provider.h"
+#include "update_engine/update_manager/variable.h"
+
+namespace chromeos_update_manager {
+
+enum class ConnectionType {
+  kEthernet,
+  kWifi,
+  kWimax,
+  kBluetooth,
+  kCellular,
+  kUnknown
+};
+
+enum class ConnectionTethering {
+  kNotDetected,
+  kSuspected,
+  kConfirmed,
+  kUnknown,
+};
+
+// Provider for networking related information.
+class ShillProvider : public Provider {
+ public:
+  virtual ~ShillProvider() {}
+
+  // A variable returning whether we currently have network connectivity.
+  virtual Variable<bool>* var_is_connected() = 0;
+
+  // A variable returning the current network connection type. Unknown if not
+  // connected.
+  virtual Variable<ConnectionType>* var_conn_type() = 0;
+
+  // A variable returning the tethering mode of a network connection. Unknown if
+  // not connected.
+  virtual Variable<ConnectionTethering>* var_conn_tethering() = 0;
+
+  // A variable retruning the time when network connection last changed.
+  // Initialized to current time.
+  virtual Variable<base::Time>* var_conn_last_changed() = 0;
+
+ protected:
+  ShillProvider() {}
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ShillProvider);
+};
+
+}  // namespace chromeos_update_manager
+
+#endif  // CHROMEOS_PLATFORM_UPDATE_ENGINE_UPDATE_MANAGER_SHILL_PROVIDER_H_