Remove JavaStringBuilder

pkg/analyzer/lib/src/generated/error.dart

Index: pkg/analyzer/lib/src/generated/error.dart
diff --git a/pkg/analyzer/lib/src/generated/error.dart b/pkg/analyzer/lib/src/generated/error.dart
index e0b7593d51ff6e5feb4fa9dd5977184f90303535..a197646fcd2c3199a0f0842e8cf6bef7754e73cf 100644
--- a/pkg/analyzer/lib/src/generated/error.dart
+++ b/pkg/analyzer/lib/src/generated/error.dart
@@ -201,16 +201,16 @@ class AnalysisError {
 
   @override
   String toString() {
-    JavaStringBuilder builder = new JavaStringBuilder();
-    builder.append((source != null) ? source.fullName : "<unknown source>");
-    builder.append("(");
-    builder.append(_offset);
-    builder.append("..");
-    builder.append(_offset + _length - 1);
-    builder.append("): ");
-    //builder.append("(" + lineNumber + ":" + columnNumber + "): ");
-    builder.append(_message);
-    return builder.toString();
+    StringBuffer buffer = new StringBuffer();
+    buffer.write((source != null) ? source.fullName : "<unknown source>");
+    buffer.write("(");
+    buffer.write(_offset);
+    buffer.write("..");
+    buffer.write(_offset + _length - 1);
+    buffer.write("): ");
+    //buffer.write("(" + lineNumber + ":" + columnNumber + "): ");
+    buffer.write(_message);
+    return buffer.toString();
   }
 }