arc: bluetooth: Set advertisement max slot to 1

components/arc/bluetooth/arc_bluetooth_bridge.h

 // 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.
 
 #ifndef COMPONENTS_ARC_BLUETOOTH_ARC_BLUETOOTH_BRIDGE_H_
 #define COMPONENTS_ARC_BLUETOOTH_ARC_BLUETOOTH_BRIDGE_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 454 matching lines @@
   //
   // When a handle is reserved, an entry is placed into the advertisements_
   // map. This entry is not yet associated with a device::BluetoothAdvertisement
   // because the instance hasn't sent us any advertising data yet, so its
   // mapped value is nullptr until that happens. Thus we have three states for a
   // handle:
   // * unmapped -> free
   // * mapped to nullptr -> reserved, awaiting data
   // * mapped to a device::BluetoothAdvertisement -> in use, and the mapped
   //   BluetoothAdvertisement is currently registered with the adapter.
-  enum { kMaxAdvertisements = 5 };
+  // TODO(crbug.com/658385) Change back to 5 when we support setting signal
+  // strength per each advertisement slot.
+  enum { kMaxAdvertisements = 1 };
   std::map<int32_t, scoped_refptr<device::BluetoothAdvertisement>>
       advertisements_;
 
   base::ThreadChecker thread_checker_;
 
   // WeakPtrFactory to use for callbacks.
   base::WeakPtrFactory<ArcBluetoothBridge> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ArcBluetoothBridge);
 };
 
 }  // namespace arc
 
 #endif  // COMPONENTS_ARC_BLUETOOTH_ARC_BLUETOOTH_BRIDGE_H_