Implement the gattserverdisconnected event.

third_party/WebKit/Source/modules/bluetooth/BluetoothRemoteGATTServer.cpp

Index: third_party/WebKit/Source/modules/bluetooth/BluetoothRemoteGATTServer.cpp
diff --git a/third_party/WebKit/Source/modules/bluetooth/BluetoothRemoteGATTServer.cpp b/third_party/WebKit/Source/modules/bluetooth/BluetoothRemoteGATTServer.cpp
index 9c7c35de669077161c8e4d9e1d8415d5cfeb0036..4cccb105fbb2582b107ea8bf2e05cd4ad7e3ea32 100644
--- a/third_party/WebKit/Source/modules/bluetooth/BluetoothRemoteGATTServer.cpp
+++ b/third_party/WebKit/Source/modules/bluetooth/BluetoothRemoteGATTServer.cpp
@@ -9,6 +9,7 @@
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "core/dom/DOMException.h"
 #include "core/dom/ExceptionCode.h"
+#include "core/events/Event.h"
 #include "modules/bluetooth/BluetoothError.h"
 #include "modules/bluetooth/BluetoothRemoteGATTService.h"
 #include "modules/bluetooth/BluetoothSupplement.h"
@@ -67,15 +68,18 @@ ScriptPromise BluetoothRemoteGATTServer::connect(ScriptState* scriptState)
 
     ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
     ScriptPromise promise = resolver->promise();
-    webbluetooth->connect(device()->id(), new ConnectCallback(device(), resolver));
+    webbluetooth->connect(device()->id(), device(), new ConnectCallback(device(), resolver));
     return promise;
 }
 
 void BluetoothRemoteGATTServer::disconnect(ScriptState* scriptState)
 {
+    if (!m_connected)
+        return;
     m_connected = false;
     WebBluetooth* webbluetooth = BluetoothSupplement::fromScriptState(scriptState);
     webbluetooth->disconnect(device()->id());
+    device()->dispatchEvent(Event::createBubble(EventTypeNames::gattserverdisconnected));
 }
 
 ScriptPromise BluetoothRemoteGATTServer::getPrimaryService(ScriptState* scriptState, const StringOrUnsignedLong& service, ExceptionState& exceptionState)