bluetooth: Return int8_t and use -128 for unknown tx power.

content/browser/bluetooth/bluetooth_dispatcher_host.cc

 // Copyright 2014 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.
 
 // ID Not In Map Note:
 // A service, characteristic, or descriptor ID not in the corresponding
 // BluetoothDispatcherHost map [service_to_device_, characteristic_to_service_,
 // descriptor_to_characteristic_] implies a hostile renderer because a renderer
 // obtains the corresponding ID from this class and it will be added to the map
 // at that time.
@@ skipping 900 matching lines @@
     if (allowed_devices_map_.IsOriginAllowedToAccessService(
             session->origin, device_id_for_origin, uuid.canonical_value())) {
       VLOG(1) << "\t Allowed: " << uuid.canonical_value();
       filtered_uuids.push_back(uuid);
     } else {
       VLOG(1) << "\t Not Allowed: " << uuid.canonical_value();
     }
   }
 
   content::BluetoothDevice device_ipc(
-      device_id_for_origin,  // id
-      device->GetName(),     // name
-      content::BluetoothDevice::ValidatePower(
-          device->GetInquiryTxPower()),  // tx_power
-      content::BluetoothDevice::ValidatePower(
-          device->GetInquiryRSSI()),  // rssi
+      device_id_for_origin,         // id
+      device->GetName(),            // name
+      device->GetInquiryTxPower(),  // tx_power
+      device->GetInquiryRSSI(),     // rssi
       content::BluetoothDevice::UUIDsFromBluetoothUUIDs(
           filtered_uuids));  // uuids
   RecordRequestDeviceOutcome(UMARequestDeviceOutcome::SUCCESS);
   Send(new BluetoothMsg_RequestDeviceSuccess(session->thread_id,
                                              session->request_id, device_ipc));
   request_device_sessions_.Remove(chooser_id);
 }
 
 void BluetoothDispatcherHost::OnGATTConnectionCreated(
     int thread_id,
@@ skipping 65 matching lines @@
     adapter_->RemoveObserver(observer);
   }
 }
 
 url::Origin BluetoothDispatcherHost::GetOrigin(int frame_routing_id) {
   return RenderFrameHostImpl::FromID(render_process_id_, frame_routing_id)
       ->GetLastCommittedOrigin();
 }
 
 }  // namespace content