Oilpan: fix building with blink_gc_profiling:1

Source/platform/heap/ThreadState.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 428 matching lines @@
     json->endArray();
 #undef SNAPSHOT_HEAP
 
     json->setInteger("allocatedSpace", Heap::allocatedSpace());
     json->setInteger("objectSpace", Heap::allocatedObjectSize());
     json->setInteger("pageCount", info.pageCount);
     json->setInteger("freeSize", info.freeSize);
 
     Vector<String> classNameVector(info.classTags.size());
     for (SnapshotInfo::ClassTagMap::iterator it = info.classTags.begin(); it != info.classTags.end(); ++it)
-        classNameVector[it->value] = it->key->m_className;
+        classNameVector[it->value] = it->key->className();
 
     size_t liveSize = 0;
     size_t deadSize = 0;
     json->beginArray("classes");
     for (size_t i = 0; i < classNameVector.size(); ++i) {
         json->beginDictionary();
         json->setString("name", classNameVector[i]);
         json->setInteger("liveCount", info.liveCount[i]);
         json->setInteger("deadCount", info.deadCount[i]);
         json->setInteger("liveSize", info.liveSize[i]);
@@ skipping 1147 matching lines @@
         json->beginArray(it->key.ascii().data());
         for (size_t age = 0; age <= maxHeapObjectAge; ++age)
             json->pushInteger(it->value.ages[age]);
         json->endArray();
     }
     TRACE_EVENT_OBJECT_SNAPSHOT_WITH_ID(TRACE_DISABLED_BY_DEFAULT("blink_gc"), statsName, this, json.release());
 }
 #endif
 
 } // namespace blink