Revert "Fix observatory tests broken by running dartfmt."

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

Index: runtime/observatory/tests/observatory_ui/mocks/objects/megamorphiccache.dart
diff --git a/runtime/observatory/tests/observatory_ui/mocks/objects/megamorphiccache.dart b/runtime/observatory/tests/observatory_ui/mocks/objects/megamorphiccache.dart
index 4e077f281b6dda4cab9bc781db2c845daceb2d19..b9bbd3df01f53d610a194fa81ce409dcf823c623 100644
--- a/runtime/observatory/tests/observatory_ui/mocks/objects/megamorphiccache.dart
+++ b/runtime/observatory/tests/observatory_ui/mocks/objects/megamorphiccache.dart
@@ -8,8 +8,8 @@ class MegamorphicCacheRefMock implements M.MegamorphicCacheRef {
   final String id;
   final String selector;
 
-  const MegamorphicCacheRefMock(
-      {this.id: 'megamorphiccache-id', this.selector: 'selector'});
+  const MegamorphicCacheRefMock({this.id : 'megamorphiccache-id',
+                                 this.selector: 'selector'});
 }
 
 class MegamorphicCacheMock implements M.MegamorphicCache {
@@ -22,13 +22,12 @@ class MegamorphicCacheMock implements M.MegamorphicCache {
   final M.InstanceRef buckets;
   final M.InstanceRef argumentsDescriptor;
 
-  const MegamorphicCacheMock(
-      {this.id: 'megamorphiccache-id',
-      this.vmName: 'megamorphiccache-vmName',
-      this.clazz: const ClassRefMock(),
-      this.size: 1,
-      this.selector: 'selector',
-      this.mask: 0,
-      this.buckets: const InstanceRefMock(),
-      this.argumentsDescriptor: const InstanceRefMock()});
+  const MegamorphicCacheMock({this.id : 'megamorphiccache-id',
+                              this.vmName: 'megamorphiccache-vmName',
+                              this.clazz: const ClassRefMock(),
+                              this.size: 1, this.selector: 'selector',
+                              this.mask: 0,
+                              this.buckets: const InstanceRefMock(),
+                              this.argumentsDescriptor: const InstanceRefMock()
+                             });
 }