Revert "Fix observatory tests broken by running dartfmt."

runtime/observatory/tests/observatory_ui/mocks/objects/error.dart

Index: runtime/observatory/tests/observatory_ui/mocks/objects/error.dart
diff --git a/runtime/observatory/tests/observatory_ui/mocks/objects/error.dart b/runtime/observatory/tests/observatory_ui/mocks/objects/error.dart
index 5c769819879f624947a50da908d9912cc61fab0f..162d39ad7f2ce304853686cb278104128b37a28c 100644
--- a/runtime/observatory/tests/observatory_ui/mocks/objects/error.dart
+++ b/runtime/observatory/tests/observatory_ui/mocks/objects/error.dart
@@ -9,10 +9,9 @@ class ErrorRefMock implements M.ErrorRef {
   final M.ErrorKind kind;
   final String message;
 
-  const ErrorRefMock(
-      {this.id: 'error-ref',
-      this.kind: M.ErrorKind.internalError,
-      this.message: 'Error Message'});
+  const ErrorRefMock({this.id: 'error-ref',
+                      this.kind: M.ErrorKind.internalError,
+                      this.message: 'Error Message'});
 }
 
 class ErrorMock implements M.Error {
@@ -23,11 +22,8 @@ class ErrorMock implements M.Error {
   final M.ErrorKind kind;
   final String message;
 
-  const ErrorMock(
-      {this.id: 'error-id',
-      this.vmName: 'error-vmName',
-      this.clazz: const ClassMock(),
-      this.size: 0,
-      this.kind: M.ErrorKind.internalError,
-      this.message: 'Error Message'});
+  const ErrorMock({this.id: 'error-id', this.vmName: 'error-vmName',
+                   this.clazz: const ClassMock(), this.size: 0,
+                   this.kind: M.ErrorKind.internalError,
+                   this.message: 'Error Message'});
 }