Revert of bluetooth: Move testing IPC from BluetoothDispatcher to BlinkTestRunner

content/child/bluetooth/bluetooth_dispatcher.cc

Index: content/child/bluetooth/bluetooth_dispatcher.cc
diff --git a/content/child/bluetooth/bluetooth_dispatcher.cc b/content/child/bluetooth/bluetooth_dispatcher.cc
index c76c5ef571eadad3147379c3132f856490e77285..47d2531cc16aab824a0d8bc3895fbb5db315bfb0 100644
--- a/content/child/bluetooth/bluetooth_dispatcher.cc
+++ b/content/child/bluetooth/bluetooth_dispatcher.cc
@@ -120,6 +120,11 @@
                                         device_instance_id.utf8()));
 }
 
+void BluetoothDispatcher::SetBluetoothMockDataSetForTesting(
+    const std::string& name) {
+  Send(new BluetoothHostMsg_SetBluetoothMockDataSetForTesting(name));
+}
+
 void BluetoothDispatcher::OnWorkerRunLoopStopped() {
   delete this;
 }