Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/modules/bluetooth/BluetoothDevice.h

Index: third_party/WebKit/Source/modules/bluetooth/BluetoothDevice.h
diff --git a/third_party/WebKit/Source/modules/bluetooth/BluetoothDevice.h b/third_party/WebKit/Source/modules/bluetooth/BluetoothDevice.h
index f4a8072bc4c5f677a60c599bc5ebb47e73583cf2..1eb90a3ceb111e5e5da5ce0b29a91a9283d37f59 100644
--- a/third_party/WebKit/Source/modules/bluetooth/BluetoothDevice.h
+++ b/third_party/WebKit/Source/modules/bluetooth/BluetoothDevice.h
@@ -37,7 +37,7 @@ class BluetoothDevice final
     USING_PRE_FINALIZER(BluetoothDevice, dispose);
     DEFINE_WRAPPERTYPEINFO();
     REFCOUNTED_GARBAGE_COLLECTED_EVENT_TARGET(BluetoothDevice);
-    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(BluetoothDevice);
+    USING_GARBAGE_COLLECTED_MIXIN(BluetoothDevice);
 public:
     BluetoothDevice(ExecutionContext*, PassOwnPtr<WebBluetoothDevice>);