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..d06cb066e953965088ff9e17c9c81219b27bd8eb 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 generate DOMExceptions for errors when the device is not connected.

[scheib, 2017/03/04 19:07:31]

Grammar is odd here. Should this be: "Used when generating DOMExceptions ..."?
Also, the comment will rot easily if we ever have another need for it, so maybe
just generalize the comment.

[ortuno, 2017/03/07 04:18:20]

Done.

+// 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);