Delete patch classes once they are applied

runtime/vm/parser.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/parser.h"
 #include "vm/flags.h"
 
 #ifndef DART_PRECOMPILED
 
 #include "lib/invocation_mirror.h"
@@ skipping 4626 matching lines @@
     }
   }
   ASSERT(!super_type.IsNull() || cls.IsObjectClass());
   cls.set_super_type(super_type);
 
   if (CurrentToken() == Token::kIMPLEMENTS) {
     ParseInterfaceList(cls);
   }
 
   if (is_patch) {
+    cls.set_is_patch();
     // Apply the changes to the patched class looked up above.
     ASSERT(obj.raw() == library_.LookupLocalObject(class_name));
     // The patched class must not be finalized yet.
-    const Class& orig_class = Class::Cast(obj);
-    ASSERT(!orig_class.is_finalized());
-    orig_class.SetPatchClass(cls);
-    cls.set_is_patch();
+    ASSERT(!Class::Cast(obj).is_finalized());
+    library_.AddPatchClass(cls);
   }
   pending_classes.Add(cls, Heap::kOld);
 
   if (is_mixin_declaration) {
     ExpectSemicolon();
   } else {
     CheckToken(Token::kLBRACE);
     SkipBlock();
     ExpectToken(Token::kRBRACE);
   }
@@ skipping 9787 matching lines @@
     const ArgumentListNode& function_args,
     const LocalVariable* temp_for_last_arg,
     bool is_super_invocation) {
   UNREACHABLE();
   return NULL;
 }
 
 }  // namespace dart
 
 #endif  // DART_PRECOMPILED