Implemented BluetoothAdapterMac::AddDevices().

device/bluetooth/bluetooth_adapter_mac.h

Index: device/bluetooth/bluetooth_adapter_mac.h
diff --git a/device/bluetooth/bluetooth_adapter_mac.h b/device/bluetooth/bluetooth_adapter_mac.h
index 30857c728bf26b5d1dd177faca79fc555d8c4aba..b6edc9f8bc80e897fe5d0551c17608126c5b9f21 100644
--- a/device/bluetooth/bluetooth_adapter_mac.h
+++ b/device/bluetooth/bluetooth_adapter_mac.h
@@ -12,6 +12,12 @@
 #include "base/observer_list.h"
 #include "device/bluetooth/bluetooth_adapter.h"
 
+#ifdef __OBJC__
+@class NSArray;
+#else
+class NSArray;
+#endif
+
 namespace base {
 
 class SequencedTaskRunner;
@@ -59,6 +65,11 @@ class BluetoothAdapterMac : public BluetoothAdapter {
       scoped_refptr<base::SequencedTaskRunner> ui_task_runner);
   void PollAdapter();
 
+  // Updates |devices_| to be consistent with |devices| and notifies observers
+  // of the changes.
+  // |devices| is an array of pointers to |IOBluetoothDevice| instances.
+  void UpdateDevices(NSArray* devices);
+
   bool powered_;
 
   scoped_refptr<base::SequencedTaskRunner> ui_task_runner_;