bluetooth: Better disconnected error messages for characteristic retrieval.

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

Index: third_party/WebKit/Source/modules/bluetooth/BluetoothError.h
diff --git a/third_party/WebKit/Source/modules/bluetooth/BluetoothError.h b/third_party/WebKit/Source/modules/bluetooth/BluetoothError.h
index 8e989506173e4a1c83b04068bf790a9a1e140bdb..9ebdd14284a49ff2d4aec7063edef7dd1510b747 100644
--- a/third_party/WebKit/Source/modules/bluetooth/BluetoothError.h
+++ b/third_party/WebKit/Source/modules/bluetooth/BluetoothError.h
@@ -11,6 +11,13 @@
 
 namespace blink {
 
+// Used when generating DOMExceptions specific to each operation.
+// TODO(crbug.com/684445): Add DescriptorsRetrieval and GATTOperation.
+enum class BluetoothOperation {
+  ServicesRetrieval,
+  CharacteristicsRetrieval,
+};
+
 // These error codes requires detailed error messages.
 enum class BluetoothErrorCode {
   InvalidService,
@@ -29,6 +36,7 @@ class BluetoothError {
   STATIC_ONLY(BluetoothError);
 
  public:
+  static DOMException* createNotConnectedException(BluetoothOperation);
   static DOMException* createDOMException(BluetoothErrorCode,
                                           const String& detailedMessage);