bluetooth: show better error messages for services, characteristics and descriptors

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

Index: third_party/WebKit/Source/modules/bluetooth/BluetoothError.cpp
diff --git a/third_party/WebKit/Source/modules/bluetooth/BluetoothError.cpp b/third_party/WebKit/Source/modules/bluetooth/BluetoothError.cpp
index 383649d5fa405a3c9da61f73c70abbcee2f0525a..b2fd07d3e91a46796fc5a5e1cbf05317a1989431 100644
--- a/third_party/WebKit/Source/modules/bluetooth/BluetoothError.cpp
+++ b/third_party/WebKit/Source/modules/bluetooth/BluetoothError.cpp
@@ -9,15 +9,25 @@
 
 namespace blink {
 
-DOMException* BluetoothError::take(ScriptPromiseResolver*,
+DOMException* BluetoothError::take(ScriptPromiseResolver* resolver,
                                    mojom::blink::WebBluetoothResult error) {
+  return take(resolver, error, String());
+}
+
+DOMException* BluetoothError::take(ScriptPromiseResolver* resolver,
+                                   mojom::blink::WebBluetoothResult error,
+                                   String detailedMessage) {
   switch (error) {
     case mojom::blink::WebBluetoothResult::SUCCESS:
       ASSERT_NOT_REACHED();
       return DOMException::create(UnknownError);
-#define MAP_ERROR(enumeration, name, message)         \
-  case mojom::blink::WebBluetoothResult::enumeration: \
-    return DOMException::create(name, message)
+#define MAP_ERROR(enumeration, name, message)             \
+  case mojom::blink::WebBluetoothResult::enumeration:     \
+    if (detailedMessage.isEmpty()) {                      \
+      return DOMException::create(name, message);         \
+    } else {                                              \
+      return DOMException::create(name, detailedMessage); \
+    }
 
       // InvalidModificationErrors:
       MAP_ERROR(GATT_INVALID_ATTRIBUTE_LENGTH, InvalidModificationError,