Expose device RSSI and Tx power via the chrome.bluetooth API.

chrome/browser/extensions/api/bluetooth/bluetooth_api_utils.cc

Index: chrome/browser/extensions/api/bluetooth/bluetooth_api_utils.cc
diff --git a/chrome/browser/extensions/api/bluetooth/bluetooth_api_utils.cc b/chrome/browser/extensions/api/bluetooth/bluetooth_api_utils.cc
index bd7bec3e5f5ac6eb83f1079d719e8f44b3020fd8..e13ec1b68129b75fd7b614baef51f1be8825efb5 100644
--- a/chrome/browser/extensions/api/bluetooth/bluetooth_api_utils.cc
+++ b/chrome/browser/extensions/api/bluetooth/bluetooth_api_utils.cc
@@ -112,6 +112,19 @@ void BluetoothDeviceToApiDevice(const device::BluetoothDevice& device,
   out->paired.reset(new bool(device.IsPaired()));
   out->connected.reset(new bool(device.IsConnected()));
 
+  int rssi = device.GetRSSI();
+  if (rssi != BluetoothDevice::kUnknownPower)
+    out->rssi.reset(new int(rssi));
+
+  if (*out->connected) {
+    int current_transmit_power = device.GetCurrentHostTransmitPower();
+    if (current_transmit_power != BluetoothDevice::kUnknownPower)
+      out->current_host_transmit_power.reset(new int(current_transmit_power));
+    int maximum_transmit_power = device.GetMaximumHostTransmitPower();
+    if (maximum_transmit_power != BluetoothDevice::kUnknownPower)
+      out->maximum_host_transmit_power.reset(new int(maximum_transmit_power));
+  }
+
   std::vector<std::string>* string_uuids = new std::vector<std::string>();
   const device::BluetoothDevice::UUIDList& uuids = device.GetUUIDs();
   for (device::BluetoothDevice::UUIDList::const_iterator iter = uuids.begin();