Eliminate RawClass::patch_class_ field

runtime/vm/compiler.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/compiler.h"
 
 #include "vm/assembler.h"
 
 #include "vm/ast_printer.h"
 #include "vm/block_scheduler.h"
@@ skipping 231 matching lines @@
     if (!parse_class.is_finalized() && !parse_class.is_marked_for_parsing()) {
       parse_list->Add(parse_class);
       parse_class.set_is_marked_for_parsing();
     }
     parse_class ^= parse_class.SuperClass();
   }
 
   // Add patch classes if they exist to the parse list if they have not already
   // been parsed and patched. Mark the class as parsed so that we don't
   // recursively add it back into the list.
-  parse_class ^= cls.patch_class();
+  parse_class ^= cls.GetPatchClass();
   if (!parse_class.IsNull()) {
     if (!parse_class.is_finalized() && !parse_class.is_marked_for_parsing()) {
       patch_list->Add(parse_class);
       parse_class.set_is_marked_for_parsing();
     }
   }
 }
 
 
 RawError* Compiler::CompileClass(const Class& cls) {
@@ skipping 1293 matching lines @@
           isolate->current_zone(), GrowableObjectArray::New()));
       start_task = true;
     }
   }
   if (start_task) {
     Dart::thread_pool()->Run(isolate->background_compiler());
   }
 }
 
 }  // namespace dart