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

chrome/browser/extensions/api/bluetooth/bluetooth_private_api.h

Index: chrome/browser/extensions/api/bluetooth/bluetooth_private_api.h
diff --git a/chrome/browser/extensions/api/bluetooth/bluetooth_private_api.h b/chrome/browser/extensions/api/bluetooth/bluetooth_private_api.h
index 5c65e0fee8ee1f2da38ce9269b45a509c8e17f89..f1f13c919eb1880e7825d785485301121bb1ee7f 100644
--- a/chrome/browser/extensions/api/bluetooth/bluetooth_private_api.h
+++ b/chrome/browser/extensions/api/bluetooth/bluetooth_private_api.h
@@ -118,6 +118,20 @@ class BluetoothPrivateSetPairingResponseFunction
   DISALLOW_COPY_AND_ASSIGN(BluetoothPrivateSetPairingResponseFunction);
 };
 
+class BluetoothPrivateGetDeviceRSSIFunction
+    : public BluetoothExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION("bluetoothPrivate.getDeviceRSSI",
+                             BLUETOOTHPRIVATE_GETDEVICERSSI)
+  BluetoothPrivateGetDeviceRSSIFunction();
+  // BluetoothExtensionFunction overrides:
+  virtual bool DoWork(scoped_refptr<device::BluetoothAdapter> adapter) OVERRIDE;
+
+ private:
+  virtual ~BluetoothPrivateGetDeviceRSSIFunction();
+  DISALLOW_COPY_AND_ASSIGN(BluetoothPrivateGetDeviceRSSIFunction);
+};
+
 }  // namespace api
 
 }  // namespace extensions