New Mojom Parser: Serialization.

mojom/mojom_parser/mojom/mojom_descriptor.go

Index: mojom/mojom_parser/mojom/mojom_descriptor.go
diff --git a/mojom/mojom_parser/mojom/mojom_descriptor.go b/mojom/mojom_parser/mojom/mojom_descriptor.go
index 4ecac5fb01fa75d4122e2a846e18f348660629cd..12aff355cf4d820a32358b60dc14fb76217c28b5 100644
--- a/mojom/mojom_parser/mojom/mojom_descriptor.go
+++ b/mojom/mojom_parser/mojom/mojom_descriptor.go
@@ -474,14 +474,21 @@ func computeTypeKey(fullyQualifiedName string) (typeKey string) {
 	if typeKey, ok := fqnToTypeKey[fullyQualifiedName]; ok == true {
 		return typeKey
 	}
-	typeKey = fmt.Sprintf("%d", nextKey)
-	nextKey++
+	// TODO(rudominer) Until we understand better what the requirements are for a type key
+	// let's just use the reversed fully-qualified name as the type key. The reason
+	// for the reversal is pragmatic: When debugging we can tell whether a string
+	// is a type key or a fully-qualified-name
+	numBytes := len(fullyQualifiedName)
+	reversed := make([]byte, numBytes)
+	for i := 0; i < numBytes; i++ {
+		reversed[i] = fullyQualifiedName[numBytes-i-1]
+	}
+	typeKey = string(reversed)
 	fqnToTypeKey[fullyQualifiedName] = typeKey
 	return
 }
 
 var fqnToTypeKey map[string]string
-var nextKey int
 
 func init() {
 	fqnToTypeKey = make(map[string]string)